diff --git a/__tests__/distributors/adopt-installer.test.ts b/__tests__/distributors/adopt-installer.test.ts
index ff477be05..05be8d53c 100644
--- a/__tests__/distributors/adopt-installer.test.ts
+++ b/__tests__/distributors/adopt-installer.test.ts
@@ -4,6 +4,7 @@ import {
   AdoptDistribution,
   AdoptImplementation
 } from '../../src/distributions/adopt/installer';
+import {TemurinDistribution} from '../../src/distributions/temurin/installer';
 import {JavaInstallerOptions} from '../../src/distributions/base-models';
 
 import os from 'os';
@@ -14,6 +15,7 @@ import * as core from '@actions/core';
 describe('getAvailableVersions', () => {
   let spyHttpClient: jest.SpyInstance;
   let spyCoreError: jest.SpyInstance;
+  let spyCoreWarning: jest.SpyInstance;
 
   beforeEach(() => {
     spyHttpClient = jest.spyOn(HttpClient.prototype, 'getJson');
@@ -26,6 +28,8 @@ describe('getAvailableVersions', () => {
     // Mock core.error to suppress error logs
     spyCoreError = jest.spyOn(core, 'error');
     spyCoreError.mockImplementation(() => {});
+    spyCoreWarning = jest.spyOn(core, 'warning');
+    spyCoreWarning.mockImplementation(() => {});
   });
 
   afterEach(() => {
@@ -136,22 +140,19 @@ describe('getAvailableVersions', () => {
   );
 
   it('load available versions', async () => {
+    const nextPageUrl =
+      'https://api.adoptopenjdk.net/v3/assets/version/%5B1.0,100.0%5D?page=1&page_size=20';
     spyHttpClient = jest.spyOn(HttpClient.prototype, 'getJson');
     spyHttpClient
       .mockReturnValueOnce({
         statusCode: 200,
-        headers: {},
+        headers: {link: `<${nextPageUrl}>; rel="next"`},
         result: manifestData as any
       })
       .mockReturnValueOnce({
         statusCode: 200,
         headers: {},
         result: manifestData as any
-      })
-      .mockReturnValueOnce({
-        statusCode: 200,
-        headers: {},
-        result: []
       });
 
     const distribution = new AdoptDistribution(
@@ -166,6 +167,34 @@ describe('getAvailableVersions', () => {
     const availableVersions = await distribution['getAvailableVersions']();
     expect(availableVersions).not.toBeNull();
     expect(availableVersions.length).toBe(manifestData.length * 2);
+    expect(spyHttpClient).toHaveBeenNthCalledWith(2, nextPageUrl);
+  });
+
+  it('stops pagination after 1000 pages as a safeguard', async () => {
+    const nextPageUrl =
+      'https://api.adoptopenjdk.net/v3/assets/version/%5B1.0,100.0%5D?page=2&page_size=20';
+    spyHttpClient.mockReturnValue({
+      statusCode: 200,
+      headers: {link: `<${nextPageUrl}>; rel="next"`},
+      result: [{version_data: {semver: '17.0.1'}, binaries: []}] as any
+    });
+
+    const distribution = new AdoptDistribution(
+      {
+        version: '11',
+        architecture: 'x64',
+        packageType: 'jdk',
+        checkLatest: false
+      },
+      AdoptImplementation.Hotspot
+    );
+
+    await distribution['getAvailableVersions']();
+
+    expect(spyHttpClient).toHaveBeenCalledTimes(1000);
+    expect(spyCoreWarning).toHaveBeenCalledWith(
+      expect.stringContaining('Reached pagination safeguard limit (1000 pages)')
+    );
   });
 
   it.each([
@@ -228,6 +257,38 @@ describe('getAvailableVersions', () => {
 });
 
 describe('findPackageForDownload', () => {
+  it('returns Temurin result and does not query Adopt API when Temurin succeeds', async () => {
+    const temurinRelease = {
+      version: '11.0.31+11',
+      url: 'https://example.test/temurin-11.tar.gz'
+    };
+    const temurinFindPackageForDownload = jest
+      .fn()
+      .mockResolvedValue(temurinRelease);
+    const temurinDistribution = {
+      findPackageForDownload: temurinFindPackageForDownload
+    } as unknown as TemurinDistribution;
+
+    const distribution = new AdoptDistribution(
+      {
+        version: '11',
+        architecture: 'x64',
+        packageType: 'jdk',
+        checkLatest: false
+      },
+      AdoptImplementation.Hotspot,
+      temurinDistribution
+    );
+    const adoptLookupSpy = jest.fn();
+    distribution['getAvailableVersions'] = adoptLookupSpy;
+
+    const resolvedVersion = await distribution['findPackageForDownload']('11');
+
+    expect(resolvedVersion).toEqual(temurinRelease);
+    expect(temurinFindPackageForDownload).toHaveBeenCalledWith('11');
+    expect(adoptLookupSpy).not.toHaveBeenCalled();
+  });
+
   it.each([
     ['9', '9.0.7+10'],
     ['15', '15.0.2+7'],
@@ -250,6 +311,11 @@ describe('findPackageForDownload', () => {
       },
       AdoptImplementation.Hotspot
     );
+    // Mock Temurin to fail so fallback to AdoptOpenJDK is tested
+    distribution['temurinDistribution']!['findPackageForDownload'] =
+      async () => {
+        throw new Error('No matching version found for SemVer');
+      };
     distribution['getAvailableVersions'] = async () => manifestData as any;
     const resolvedVersion = await distribution['findPackageForDownload'](input);
     expect(resolvedVersion.version).toBe(expected);
@@ -265,6 +331,11 @@ describe('findPackageForDownload', () => {
       },
       AdoptImplementation.Hotspot
     );
+    // Mock Temurin to fail so fallback to AdoptOpenJDK is tested
+    distribution['temurinDistribution']!['findPackageForDownload'] =
+      async () => {
+        throw new Error('No matching version found for SemVer');
+      };
     distribution['getAvailableVersions'] = async () => manifestData as any;
     await expect(
       distribution['findPackageForDownload']('9.0.8')
@@ -281,6 +352,11 @@ describe('findPackageForDownload', () => {
       },
       AdoptImplementation.Hotspot
     );
+    // Mock Temurin to fail so fallback to AdoptOpenJDK is tested
+    distribution['temurinDistribution']!['findPackageForDownload'] =
+      async () => {
+        throw new Error('No matching version found for SemVer');
+      };
     distribution['getAvailableVersions'] = async () => manifestData as any;
     await expect(distribution['findPackageForDownload']('7.x')).rejects.toThrow(
       /No matching version found for SemVer */
@@ -297,6 +373,11 @@ describe('findPackageForDownload', () => {
       },
       AdoptImplementation.Hotspot
     );
+    // Mock Temurin to fail so fallback to AdoptOpenJDK is tested
+    distribution['temurinDistribution']!['findPackageForDownload'] =
+      async () => {
+        throw new Error('No matching version found for SemVer');
+      };
     distribution['getAvailableVersions'] = async () => [];
     await expect(distribution['findPackageForDownload']('11')).rejects.toThrow(
       /No matching version found for SemVer */
diff --git a/__tests__/distributors/semeru-installer.test.ts b/__tests__/distributors/semeru-installer.test.ts
index 1c26c79a3..03b08b728 100644
--- a/__tests__/distributors/semeru-installer.test.ts
+++ b/__tests__/distributors/semeru-installer.test.ts
@@ -9,6 +9,7 @@ import * as core from '@actions/core';
 describe('getAvailableVersions', () => {
   let spyHttpClient: jest.SpyInstance;
   let spyCoreError: jest.SpyInstance;
+  let spyCoreWarning: jest.SpyInstance;
 
   beforeEach(() => {
     spyHttpClient = jest.spyOn(HttpClient.prototype, 'getJson');
@@ -20,6 +21,8 @@ describe('getAvailableVersions', () => {
     // Mock core.error to suppress error logs
     spyCoreError = jest.spyOn(core, 'error');
     spyCoreError.mockImplementation(() => {});
+    spyCoreWarning = jest.spyOn(core, 'warning');
+    spyCoreWarning.mockImplementation(() => {});
   });
 
   afterEach(() => {
@@ -82,22 +85,19 @@ describe('getAvailableVersions', () => {
   );
 
   it('load available versions', async () => {
+    const nextPageUrl =
+      'https://api.adoptopenjdk.net/v3/assets/version/%5B1.0,100.0%5D?page=1&page_size=20';
     spyHttpClient = jest.spyOn(HttpClient.prototype, 'getJson');
     spyHttpClient
       .mockReturnValueOnce({
         statusCode: 200,
-        headers: {},
+        headers: {link: `<${nextPageUrl}>; rel="next"`},
         result: manifestData as any
       })
       .mockReturnValueOnce({
         statusCode: 200,
         headers: {},
         result: manifestData as any
-      })
-      .mockReturnValueOnce({
-        statusCode: 200,
-        headers: {},
-        result: []
       });
 
     const distribution = new SemeruDistribution({
@@ -109,6 +109,31 @@ describe('getAvailableVersions', () => {
     const availableVersions = await distribution['getAvailableVersions']();
     expect(availableVersions).not.toBeNull();
     expect(availableVersions.length).toBe(manifestData.length * 2);
+    expect(spyHttpClient).toHaveBeenNthCalledWith(2, nextPageUrl);
+  });
+
+  it('stops pagination after 1000 pages as a safeguard', async () => {
+    const nextPageUrl =
+      'https://api.adoptopenjdk.net/v3/assets/version/%5B1.0,100.0%5D?page=2&page_size=20';
+    spyHttpClient.mockReturnValue({
+      statusCode: 200,
+      headers: {link: `<${nextPageUrl}>; rel="next"`},
+      result: [{version_data: {semver: '17.0.1'}, binaries: []}] as any
+    });
+
+    const distribution = new SemeruDistribution({
+      version: '8',
+      architecture: 'x64',
+      packageType: 'jdk',
+      checkLatest: false
+    });
+
+    await distribution['getAvailableVersions']();
+
+    expect(spyHttpClient).toHaveBeenCalledTimes(1000);
+    expect(spyCoreWarning).toHaveBeenCalledWith(
+      expect.stringContaining('Reached pagination safeguard limit (1000 pages)')
+    );
   });
 
   it.each([
diff --git a/__tests__/distributors/temurin-installer.test.ts b/__tests__/distributors/temurin-installer.test.ts
index 0c6ef3f50..161a2d087 100644
--- a/__tests__/distributors/temurin-installer.test.ts
+++ b/__tests__/distributors/temurin-installer.test.ts
@@ -12,6 +12,7 @@ import * as core from '@actions/core';
 describe('getAvailableVersions', () => {
   let spyHttpClient: jest.SpyInstance;
   let spyCoreError: jest.SpyInstance;
+  let spyCoreWarning: jest.SpyInstance;
 
   beforeEach(() => {
     spyHttpClient = jest.spyOn(HttpClient.prototype, 'getJson');
@@ -23,6 +24,8 @@ describe('getAvailableVersions', () => {
     // Mock core.error to suppress error logs
     spyCoreError = jest.spyOn(core, 'error');
     spyCoreError.mockImplementation(() => {});
+    spyCoreWarning = jest.spyOn(core, 'warning');
+    spyCoreWarning.mockImplementation(() => {});
   });
 
   afterEach(() => {
@@ -93,22 +96,19 @@ describe('getAvailableVersions', () => {
   );
 
   it('load available versions', async () => {
+    const nextPageUrl =
+      'https://api.adoptium.net/v3/assets/version/%5B1.0,100.0%5D?page=1&page_size=20';
     spyHttpClient = jest.spyOn(HttpClient.prototype, 'getJson');
     spyHttpClient
       .mockReturnValueOnce({
         statusCode: 200,
-        headers: {},
+        headers: {link: `<${nextPageUrl}>; rel="next"`},
         result: manifestData as any
       })
       .mockReturnValueOnce({
         statusCode: 200,
         headers: {},
         result: manifestData as any
-      })
-      .mockReturnValueOnce({
-        statusCode: 200,
-        headers: {},
-        result: []
       });
 
     const distribution = new TemurinDistribution(
@@ -123,6 +123,34 @@ describe('getAvailableVersions', () => {
     const availableVersions = await distribution['getAvailableVersions']();
     expect(availableVersions).not.toBeNull();
     expect(availableVersions.length).toBe(manifestData.length * 2);
+    expect(spyHttpClient).toHaveBeenNthCalledWith(2, nextPageUrl);
+  });
+
+  it('stops pagination after 1000 pages as a safeguard', async () => {
+    const nextPageUrl =
+      'https://api.adoptium.net/v3/assets/version/%5B1.0,100.0%5D?page=2&page_size=20';
+    spyHttpClient.mockReturnValue({
+      statusCode: 200,
+      headers: {link: `<${nextPageUrl}>; rel="next"`},
+      result: [{version_data: {semver: '17.0.1'}, binaries: []}] as any
+    });
+
+    const distribution = new TemurinDistribution(
+      {
+        version: '8',
+        architecture: 'x64',
+        packageType: 'jdk',
+        checkLatest: false
+      },
+      TemurinImplementation.Hotspot
+    );
+
+    await distribution['getAvailableVersions']();
+
+    expect(spyHttpClient).toHaveBeenCalledTimes(1000);
+    expect(spyCoreWarning).toHaveBeenCalledWith(
+      expect.stringContaining('Reached pagination safeguard limit (1000 pages)')
+    );
   });
 
   it.each([
diff --git a/__tests__/util.test.ts b/__tests__/util.test.ts
index 85b76069e..f41d2c918 100644
--- a/__tests__/util.test.ts
+++ b/__tests__/util.test.ts
@@ -4,10 +4,12 @@ import * as fs from 'fs';
 import * as path from 'path';
 import {
   convertVersionToSemver,
+  getNextPageUrlFromLinkHeader,
   getVersionFromFileContent,
   isVersionSatisfies,
   isCacheFeatureAvailable,
-  isGhes
+  isGhes,
+  validatePaginationUrl
 } from '../src/util';
 
 jest.mock('@actions/cache');
@@ -85,6 +87,78 @@ describe('convertVersionToSemver', () => {
   });
 });
 
+describe('getNextPageUrlFromLinkHeader', () => {
+  it.each([
+    [
+      {
+        link: '<https://api.adoptium.net/v3/info/release_versions?page=1&page_size=10>; rel="next"'
+      },
+      'https://api.adoptium.net/v3/info/release_versions?page=1&page_size=10'
+    ],
+    [
+      {
+        Link: '<https://example.com/last?page=5>; rel="last", <https://example.com/next?page=2>; rel="next"'
+      },
+      'https://example.com/next?page=2'
+    ],
+    [
+      {
+        link: '<https://api.adoptium.net/v3/versions?page=3>; type="application/json"; rel="next"'
+      },
+      'https://api.adoptium.net/v3/versions?page=3'
+    ],
+    [{link: '<https://example.com/last?page=5>; rel="last"'}, null],
+    [{link: '<https://example.com/page?p=2>; rel="nextsomething"'}, null],
+    [undefined, null]
+  ])('returns %s -> %s', (headers, expected) => {
+    expect(getNextPageUrlFromLinkHeader(headers)).toBe(expected);
+  });
+});
+
+describe('validatePaginationUrl', () => {
+  it('accepts URL with matching origin', () => {
+    expect(
+      validatePaginationUrl(
+        'https://api.adoptium.net/v3/assets?page=2',
+        'https://api.adoptium.net'
+      )
+    ).toBe(true);
+  });
+
+  it('rejects URL with different host', () => {
+    expect(
+      validatePaginationUrl(
+        'https://evil.example.com/steal?data=1',
+        'https://api.adoptium.net'
+      )
+    ).toBe(false);
+  });
+
+  it('rejects URL with different protocol', () => {
+    expect(
+      validatePaginationUrl(
+        'http://api.adoptium.net/v3/assets?page=2',
+        'https://api.adoptium.net'
+      )
+    ).toBe(false);
+  });
+
+  it('returns false for invalid URL', () => {
+    expect(validatePaginationUrl('not-a-url', 'https://api.adoptium.net')).toBe(
+      false
+    );
+  });
+
+  it('accepts URL with explicit default port', () => {
+    expect(
+      validatePaginationUrl(
+        'https://api.adoptium.net:443/v3/assets?page=2',
+        'https://api.adoptium.net'
+      )
+    ).toBe(true);
+  });
+});
+
 describe('getVersionFromFileContent', () => {
   describe('.sdkmanrc', () => {
     it.each([
diff --git a/dist/cleanup/index.js b/dist/cleanup/index.js
index 9b11cf71e..eff7dac80 100644
--- a/dist/cleanup/index.js
+++ b/dist/cleanup/index.js
@@ -52134,7 +52134,7 @@ var __importDefault = (this && this.__importDefault) || function (mod) {
     return (mod && mod.__esModule) ? mod : { "default": mod };
 };
 Object.defineProperty(exports, "__esModule", ({ value: true }));
-exports.renameWinArchive = exports.getGitHubHttpHeaders = exports.convertVersionToSemver = exports.getVersionFromFileContent = exports.isCacheFeatureAvailable = exports.isGhes = exports.isJobStatusSuccess = exports.getToolcachePath = exports.isVersionSatisfies = exports.getDownloadArchiveExtension = exports.extractJdkFile = exports.getVersionFromToolcachePath = exports.getBooleanInput = exports.getTempDir = void 0;
+exports.renameWinArchive = exports.validatePaginationUrl = exports.getNextPageUrlFromLinkHeader = exports.MAX_PAGINATION_PAGES = exports.getGitHubHttpHeaders = exports.convertVersionToSemver = exports.getVersionFromFileContent = exports.isCacheFeatureAvailable = exports.isGhes = exports.isJobStatusSuccess = exports.getToolcachePath = exports.isVersionSatisfies = exports.getDownloadArchiveExtension = exports.extractJdkFile = exports.getVersionFromToolcachePath = exports.getBooleanInput = exports.getTempDir = void 0;
 const os_1 = __importDefault(__nccwpck_require__(22037));
 const path_1 = __importDefault(__nccwpck_require__(71017));
 const fs = __importStar(__nccwpck_require__(57147));
@@ -52301,6 +52301,47 @@ function getGitHubHttpHeaders() {
     return headers;
 }
 exports.getGitHubHttpHeaders = getGitHubHttpHeaders;
+exports.MAX_PAGINATION_PAGES = 1000;
+function getNextPageUrlFromLinkHeader(headers) {
+    var _a;
+    if (!headers) {
+        return null;
+    }
+    const linkHeader = (_a = headers.link) !== null && _a !== void 0 ? _a : headers.Link;
+    if (!linkHeader) {
+        return null;
+    }
+    const normalizedLinkHeader = Array.isArray(linkHeader)
+        ? linkHeader.join(',')
+        : linkHeader;
+    // Split into individual link-values and find the one with rel="next"
+    // RFC 8288 allows rel to appear anywhere among the parameters
+    const linkValues = normalizedLinkHeader.split(/,(?=\s*<)/);
+    for (const linkValue of linkValues) {
+        const urlMatch = linkValue.match(/<([^>]+)>/);
+        if (!urlMatch)
+            continue;
+        const params = linkValue.slice(urlMatch[0].length);
+        // Use word boundary to match "next" as a standalone relation type
+        // RFC 8288 allows space-separated relation types like rel="next prev"
+        if (/;\s*rel="?[^"]*\bnext\b/i.test(params)) {
+            return urlMatch[1];
+        }
+    }
+    return null;
+}
+exports.getNextPageUrlFromLinkHeader = getNextPageUrlFromLinkHeader;
+function validatePaginationUrl(url, allowedOrigin) {
+    try {
+        const parsed = new URL(url);
+        const allowed = new URL(allowedOrigin);
+        return parsed.origin === allowed.origin;
+    }
+    catch (_a) {
+        return false;
+    }
+}
+exports.validatePaginationUrl = validatePaginationUrl;
 // Rename archive to add extension because after downloading
 // archive does not contain extension type and it leads to some issues
 // on Windows runners without PowerShell Core.
diff --git a/dist/setup/index.js b/dist/setup/index.js
index eb6cab20b..a2efc14ae 100644
--- a/dist/setup/index.js
+++ b/dist/setup/index.js
@@ -77815,17 +77815,54 @@ const path_1 = __importDefault(__nccwpck_require__(71017));
 const semver_1 = __importDefault(__nccwpck_require__(11383));
 const base_installer_1 = __nccwpck_require__(59741);
 const util_1 = __nccwpck_require__(92629);
+const installer_1 = __nccwpck_require__(18579);
 var AdoptImplementation;
 (function (AdoptImplementation) {
     AdoptImplementation["Hotspot"] = "Hotspot";
     AdoptImplementation["OpenJ9"] = "OpenJ9";
 })(AdoptImplementation || (exports.AdoptImplementation = AdoptImplementation = {}));
 class AdoptDistribution extends base_installer_1.JavaBase {
-    constructor(installerOptions, jvmImpl) {
+    constructor(installerOptions, jvmImpl, temurinDistribution = null) {
         super(`Adopt-${jvmImpl}`, installerOptions);
         this.jvmImpl = jvmImpl;
+        if (temurinDistribution !== null &&
+            jvmImpl !== AdoptImplementation.Hotspot) {
+            throw new Error('Only Hotspot JVM is supported by Temurin.');
+        }
+        // Only use the temurin repo for Hotspot JVMs
+        this.temurinDistribution =
+            temurinDistribution !== null && temurinDistribution !== void 0 ? temurinDistribution : (jvmImpl === AdoptImplementation.Hotspot
+                ? new installer_1.TemurinDistribution(installerOptions, installer_1.TemurinImplementation.Hotspot)
+                : null);
     }
     findPackageForDownload(version) {
+        return __awaiter(this, void 0, void 0, function* () {
+            if (this.jvmImpl === AdoptImplementation.Hotspot) {
+                core.notice("AdoptOpenJDK has moved to Eclipse Temurin https://github.com/actions/setup-java#supported-distributions please consider changing to the 'temurin' distribution type in your setup-java configuration.");
+            }
+            if (this.jvmImpl === AdoptImplementation.Hotspot &&
+                this.temurinDistribution !== null) {
+                try {
+                    return yield this.temurinDistribution.findPackageForDownload(version);
+                }
+                catch (error) {
+                    // Log the failure but always fall back to legacy AdoptOpenJDK for resilience
+                    const errorMessage = error instanceof Error ? error.message : String(error);
+                    if (error instanceof Error && error.name === 'VersionNotFoundError') {
+                        core.notice('The JVM you are looking for could not be found in the Temurin repository, this likely indicates ' +
+                            'that you are using an out of date version of Java, consider updating and moving to using the Temurin distribution type in setup-java.');
+                    }
+                    else {
+                        // Log other errors for debugging but gracefully fall back
+                        core.debug(`Temurin lookup failed: ${errorMessage}. Falling back to AdoptOpenJDK API.`);
+                    }
+                }
+            }
+            // failed to find a Temurin version, so fall back to AdoptOpenJDK
+            return this.findPackageForDownloadOldAdoptOpenJdk(version);
+        });
+    }
+    findPackageForDownloadOldAdoptOpenJdk(version) {
         return __awaiter(this, void 0, void 0, function* () {
             const availableVersionsRaw = yield this.getAvailableVersions();
             const availableVersionsWithBinaries = availableVersionsRaw
@@ -77896,24 +77933,34 @@ class AdoptDistribution extends base_installer_1.JavaBase {
                 `release_type=${releaseType}`,
                 `jvm_impl=${this.jvmImpl.toLowerCase()}`
             ].join('&');
-            // need to iterate through all pages to retrieve the list of all versions
-            // Adopt API doesn't provide way to retrieve the count of pages to iterate so infinity loop
-            let page_index = 0;
+            const requestArguments = `${baseRequestArguments}&page_size=20&page=0`;
+            let availableVersionsUrl = `https://api.adoptopenjdk.net/v3/assets/version/${versionRange}?${requestArguments}`;
             const availableVersions = [];
-            while (true) {
-                const requestArguments = `${baseRequestArguments}&page_size=20&page=${page_index}`;
-                const availableVersionsUrl = `https://api.adoptopenjdk.net/v3/assets/version/${versionRange}?${requestArguments}`;
-                if (core.isDebug() && page_index === 0) {
-                    // url is identical except page_index so print it once for debug
-                    core.debug(`Gathering available versions from '${availableVersionsUrl}'`);
+            let pageCount = 0;
+            if (core.isDebug()) {
+                core.debug(`Gathering available versions from '${availableVersionsUrl}'`);
+            }
+            while (availableVersionsUrl) {
+                pageCount++;
+                const response = yield this.http.getJson(availableVersionsUrl);
+                const paginationPage = response.result;
+                const nextUrl = (0, util_1.getNextPageUrlFromLinkHeader)(response.headers);
+                if (nextUrl &&
+                    !(0, util_1.validatePaginationUrl)(nextUrl, 'https://api.adoptopenjdk.net')) {
+                    core.warning(`Ignoring pagination link with unexpected origin: ${nextUrl}`);
+                    availableVersionsUrl = null;
+                }
+                else {
+                    availableVersionsUrl = nextUrl;
                 }
-                const paginationPage = (yield this.http.getJson(availableVersionsUrl)).result;
                 if (paginationPage === null || paginationPage.length === 0) {
-                    // break infinity loop because we have reached end of pagination
                     break;
                 }
                 availableVersions.push(...paginationPage);
-                page_index++;
+                if (pageCount >= util_1.MAX_PAGINATION_PAGES) {
+                    core.warning(`Reached pagination safeguard limit (${util_1.MAX_PAGINATION_PAGES} pages) while listing Adopt releases.`);
+                    break;
+                }
             }
             if (core.isDebug()) {
                 core.startGroup('Print information about available versions');
@@ -78213,7 +78260,9 @@ class JavaBase {
                 parts.push(`(showing first ${maxVersionsToShow} of ${availableVersions.length} versions, enable debug mode to see all)`);
             }
         }
-        return new Error(parts.join('\n'));
+        const error = new Error(parts.join('\n'));
+        error.name = 'VersionNotFoundError';
+        return error;
     }
     setJavaDefault(version, toolPath) {
         const majorVersion = version.split('.')[0];
@@ -80071,24 +80120,34 @@ class SemeruDistribution extends base_installer_1.JavaBase {
                 `release_type=${releaseType}`,
                 `jvm_impl=openj9`
             ].join('&');
-            // need to iterate through all pages to retrieve the list of all versions
-            // Adoptium API doesn't provide way to retrieve the count of pages to iterate so infinity loop
-            let page_index = 0;
+            const requestArguments = `${baseRequestArguments}&page_size=20&page=0`;
+            let availableVersionsUrl = `https://api.adoptopenjdk.net/v3/assets/version/${versionRange}?${requestArguments}`;
             const availableVersions = [];
-            while (true) {
-                const requestArguments = `${baseRequestArguments}&page_size=20&page=${page_index}`;
-                const availableVersionsUrl = `https://api.adoptopenjdk.net/v3/assets/version/${versionRange}?${requestArguments}`;
-                if (core.isDebug() && page_index === 0) {
-                    // url is identical except page_index so print it once for debug
-                    core.debug(`Gathering available versions from '${availableVersionsUrl}'`);
+            let pageCount = 0;
+            if (core.isDebug()) {
+                core.debug(`Gathering available versions from '${availableVersionsUrl}'`);
+            }
+            while (availableVersionsUrl) {
+                pageCount++;
+                const response = yield this.http.getJson(availableVersionsUrl);
+                const paginationPage = response.result;
+                const nextUrl = (0, util_1.getNextPageUrlFromLinkHeader)(response.headers);
+                if (nextUrl &&
+                    !(0, util_1.validatePaginationUrl)(nextUrl, 'https://api.adoptopenjdk.net')) {
+                    core.warning(`Ignoring pagination link with unexpected origin: ${nextUrl}`);
+                    availableVersionsUrl = null;
+                }
+                else {
+                    availableVersionsUrl = nextUrl;
                 }
-                const paginationPage = (yield this.http.getJson(availableVersionsUrl)).result;
                 if (paginationPage === null || paginationPage.length === 0) {
-                    // break infinity loop because we have reached end of pagination
                     break;
                 }
                 availableVersions.push(...paginationPage);
-                page_index++;
+                if (pageCount >= util_1.MAX_PAGINATION_PAGES) {
+                    core.warning(`Reached pagination safeguard limit (${util_1.MAX_PAGINATION_PAGES} pages) while listing Semeru releases.`);
+                    break;
+                }
             }
             if (core.isDebug()) {
                 core.startGroup('Print information about available versions');
@@ -80175,6 +80234,9 @@ class TemurinDistribution extends base_installer_1.JavaBase {
         super(`Temurin-${jvmImpl}`, installerOptions);
         this.jvmImpl = jvmImpl;
     }
+    /**
+     * @internal For cross-distribution reuse only. Not intended as a public API.
+     */
     findPackageForDownload(version) {
         return __awaiter(this, void 0, void 0, function* () {
             const availableVersionsRaw = yield this.getAvailableVersions();
@@ -80245,24 +80307,34 @@ class TemurinDistribution extends base_installer_1.JavaBase {
                 `release_type=${releaseType}`,
                 `jvm_impl=${this.jvmImpl.toLowerCase()}`
             ].join('&');
-            // need to iterate through all pages to retrieve the list of all versions
-            // Adoptium API doesn't provide way to retrieve the count of pages to iterate so infinity loop
-            let page_index = 0;
+            const requestArguments = `${baseRequestArguments}&page_size=20&page=0`;
+            let availableVersionsUrl = `https://api.adoptium.net/v3/assets/version/${versionRange}?${requestArguments}`;
             const availableVersions = [];
-            while (true) {
-                const requestArguments = `${baseRequestArguments}&page_size=20&page=${page_index}`;
-                const availableVersionsUrl = `https://api.adoptium.net/v3/assets/version/${versionRange}?${requestArguments}`;
-                if (core.isDebug() && page_index === 0) {
-                    // url is identical except page_index so print it once for debug
-                    core.debug(`Gathering available versions from '${availableVersionsUrl}'`);
+            let pageCount = 0;
+            if (core.isDebug()) {
+                core.debug(`Gathering available versions from '${availableVersionsUrl}'`);
+            }
+            while (availableVersionsUrl) {
+                pageCount++;
+                const response = yield this.http.getJson(availableVersionsUrl);
+                const paginationPage = response.result;
+                const nextUrl = (0, util_1.getNextPageUrlFromLinkHeader)(response.headers);
+                if (nextUrl &&
+                    !(0, util_1.validatePaginationUrl)(nextUrl, 'https://api.adoptium.net')) {
+                    core.warning(`Ignoring pagination link with unexpected origin: ${nextUrl}`);
+                    availableVersionsUrl = null;
+                }
+                else {
+                    availableVersionsUrl = nextUrl;
                 }
-                const paginationPage = (yield this.http.getJson(availableVersionsUrl)).result;
                 if (paginationPage === null || paginationPage.length === 0) {
-                    // break infinity loop because we have reached end of pagination
                     break;
                 }
                 availableVersions.push(...paginationPage);
-                page_index++;
+                if (pageCount >= util_1.MAX_PAGINATION_PAGES) {
+                    core.warning(`Reached pagination safeguard limit (${util_1.MAX_PAGINATION_PAGES} pages) while listing Temurin releases.`);
+                    break;
+                }
             }
             if (core.isDebug()) {
                 core.startGroup('Print information about available versions');
@@ -80893,7 +80965,7 @@ var __importDefault = (this && this.__importDefault) || function (mod) {
     return (mod && mod.__esModule) ? mod : { "default": mod };
 };
 Object.defineProperty(exports, "__esModule", ({ value: true }));
-exports.renameWinArchive = exports.getGitHubHttpHeaders = exports.convertVersionToSemver = exports.getVersionFromFileContent = exports.isCacheFeatureAvailable = exports.isGhes = exports.isJobStatusSuccess = exports.getToolcachePath = exports.isVersionSatisfies = exports.getDownloadArchiveExtension = exports.extractJdkFile = exports.getVersionFromToolcachePath = exports.getBooleanInput = exports.getTempDir = void 0;
+exports.renameWinArchive = exports.validatePaginationUrl = exports.getNextPageUrlFromLinkHeader = exports.MAX_PAGINATION_PAGES = exports.getGitHubHttpHeaders = exports.convertVersionToSemver = exports.getVersionFromFileContent = exports.isCacheFeatureAvailable = exports.isGhes = exports.isJobStatusSuccess = exports.getToolcachePath = exports.isVersionSatisfies = exports.getDownloadArchiveExtension = exports.extractJdkFile = exports.getVersionFromToolcachePath = exports.getBooleanInput = exports.getTempDir = void 0;
 const os_1 = __importDefault(__nccwpck_require__(22037));
 const path_1 = __importDefault(__nccwpck_require__(71017));
 const fs = __importStar(__nccwpck_require__(57147));
@@ -81060,6 +81132,47 @@ function getGitHubHttpHeaders() {
     return headers;
 }
 exports.getGitHubHttpHeaders = getGitHubHttpHeaders;
+exports.MAX_PAGINATION_PAGES = 1000;
+function getNextPageUrlFromLinkHeader(headers) {
+    var _a;
+    if (!headers) {
+        return null;
+    }
+    const linkHeader = (_a = headers.link) !== null && _a !== void 0 ? _a : headers.Link;
+    if (!linkHeader) {
+        return null;
+    }
+    const normalizedLinkHeader = Array.isArray(linkHeader)
+        ? linkHeader.join(',')
+        : linkHeader;
+    // Split into individual link-values and find the one with rel="next"
+    // RFC 8288 allows rel to appear anywhere among the parameters
+    const linkValues = normalizedLinkHeader.split(/,(?=\s*<)/);
+    for (const linkValue of linkValues) {
+        const urlMatch = linkValue.match(/<([^>]+)>/);
+        if (!urlMatch)
+            continue;
+        const params = linkValue.slice(urlMatch[0].length);
+        // Use word boundary to match "next" as a standalone relation type
+        // RFC 8288 allows space-separated relation types like rel="next prev"
+        if (/;\s*rel="?[^"]*\bnext\b/i.test(params)) {
+            return urlMatch[1];
+        }
+    }
+    return null;
+}
+exports.getNextPageUrlFromLinkHeader = getNextPageUrlFromLinkHeader;
+function validatePaginationUrl(url, allowedOrigin) {
+    try {
+        const parsed = new URL(url);
+        const allowed = new URL(allowedOrigin);
+        return parsed.origin === allowed.origin;
+    }
+    catch (_a) {
+        return false;
+    }
+}
+exports.validatePaginationUrl = validatePaginationUrl;
 // Rename archive to add extension because after downloading
 // archive does not contain extension type and it leads to some issues
 // on Windows runners without PowerShell Core.
diff --git a/src/distributions/adopt/installer.ts b/src/distributions/adopt/installer.ts
index 34c1716cd..78798bfc1 100644
--- a/src/distributions/adopt/installer.ts
+++ b/src/distributions/adopt/installer.ts
@@ -14,10 +14,14 @@ import {
 } from '../base-models';
 import {
   extractJdkFile,
+  getNextPageUrlFromLinkHeader,
   getDownloadArchiveExtension,
   isVersionSatisfies,
-  renameWinArchive
+  renameWinArchive,
+  MAX_PAGINATION_PAGES,
+  validatePaginationUrl
 } from '../../util';
+import {TemurinDistribution, TemurinImplementation} from '../temurin/installer';
 
 export enum AdoptImplementation {
   Hotspot = 'Hotspot',
@@ -25,15 +29,72 @@ export enum AdoptImplementation {
 }
 
 export class AdoptDistribution extends JavaBase {
+  private readonly temurinDistribution: TemurinDistribution | null;
+
   constructor(
     installerOptions: JavaInstallerOptions,
-    private readonly jvmImpl: AdoptImplementation
+    private readonly jvmImpl: AdoptImplementation,
+    temurinDistribution: TemurinDistribution | null = null
   ) {
     super(`Adopt-${jvmImpl}`, installerOptions);
+
+    if (
+      temurinDistribution !== null &&
+      jvmImpl !== AdoptImplementation.Hotspot
+    ) {
+      throw new Error('Only Hotspot JVM is supported by Temurin.');
+    }
+
+    // Only use the temurin repo for Hotspot JVMs
+    this.temurinDistribution =
+      temurinDistribution ??
+      (jvmImpl === AdoptImplementation.Hotspot
+        ? new TemurinDistribution(
+            installerOptions,
+            TemurinImplementation.Hotspot
+          )
+        : null);
   }
 
   protected async findPackageForDownload(
     version: string
+  ): Promise<JavaDownloadRelease> {
+    if (this.jvmImpl === AdoptImplementation.Hotspot) {
+      core.notice(
+        "AdoptOpenJDK has moved to Eclipse Temurin https://github.com/actions/setup-java#supported-distributions please consider changing to the 'temurin' distribution type in your setup-java configuration."
+      );
+    }
+
+    if (
+      this.jvmImpl === AdoptImplementation.Hotspot &&
+      this.temurinDistribution !== null
+    ) {
+      try {
+        return await this.temurinDistribution.findPackageForDownload(version);
+      } catch (error) {
+        // Log the failure but always fall back to legacy AdoptOpenJDK for resilience
+        const errorMessage =
+          error instanceof Error ? error.message : String(error);
+        if (error instanceof Error && error.name === 'VersionNotFoundError') {
+          core.notice(
+            'The JVM you are looking for could not be found in the Temurin repository, this likely indicates ' +
+              'that you are using an out of date version of Java, consider updating and moving to using the Temurin distribution type in setup-java.'
+          );
+        } else {
+          // Log other errors for debugging but gracefully fall back
+          core.debug(
+            `Temurin lookup failed: ${errorMessage}. Falling back to AdoptOpenJDK API.`
+          );
+        }
+      }
+    }
+
+    // failed to find a Temurin version, so fall back to AdoptOpenJDK
+    return this.findPackageForDownloadOldAdoptOpenJdk(version);
+  }
+
+  private async findPackageForDownloadOldAdoptOpenJdk(
+    version: string
   ): Promise<JavaDownloadRelease> {
     const availableVersionsRaw = await this.getAvailableVersions();
     const availableVersionsWithBinaries = availableVersionsRaw
@@ -125,30 +186,46 @@ export class AdoptDistribution extends JavaBase {
       `jvm_impl=${this.jvmImpl.toLowerCase()}`
     ].join('&');
 
-    // need to iterate through all pages to retrieve the list of all versions
-    // Adopt API doesn't provide way to retrieve the count of pages to iterate so infinity loop
-    let page_index = 0;
+    const requestArguments = `${baseRequestArguments}&page_size=20&page=0`;
+    let availableVersionsUrl: string | null =
+      `https://api.adoptopenjdk.net/v3/assets/version/${versionRange}?${requestArguments}`;
     const availableVersions: IAdoptAvailableVersions[] = [];
-    while (true) {
-      const requestArguments = `${baseRequestArguments}&page_size=20&page=${page_index}`;
-      const availableVersionsUrl = `https://api.adoptopenjdk.net/v3/assets/version/${versionRange}?${requestArguments}`;
-      if (core.isDebug() && page_index === 0) {
-        // url is identical except page_index so print it once for debug
-        core.debug(
-          `Gathering available versions from '${availableVersionsUrl}'`
+    let pageCount = 0;
+    if (core.isDebug()) {
+      core.debug(`Gathering available versions from '${availableVersionsUrl}'`);
+    }
+
+    while (availableVersionsUrl) {
+      pageCount++;
+      const response =
+        await this.http.getJson<IAdoptAvailableVersions[]>(
+          availableVersionsUrl
         );
+      const paginationPage = response.result;
+      const nextUrl = getNextPageUrlFromLinkHeader(response.headers);
+      if (
+        nextUrl &&
+        !validatePaginationUrl(nextUrl, 'https://api.adoptopenjdk.net')
+      ) {
+        core.warning(
+          `Ignoring pagination link with unexpected origin: ${nextUrl}`
+        );
+        availableVersionsUrl = null;
+      } else {
+        availableVersionsUrl = nextUrl;
       }
-
-      const paginationPage = (
-        await this.http.getJson<IAdoptAvailableVersions[]>(availableVersionsUrl)
-      ).result;
       if (paginationPage === null || paginationPage.length === 0) {
-        // break infinity loop because we have reached end of pagination
         break;
       }
 
       availableVersions.push(...paginationPage);
-      page_index++;
+
+      if (pageCount >= MAX_PAGINATION_PAGES) {
+        core.warning(
+          `Reached pagination safeguard limit (${MAX_PAGINATION_PAGES} pages) while listing Adopt releases.`
+        );
+        break;
+      }
     }
 
     if (core.isDebug()) {
diff --git a/src/distributions/base-installer.ts b/src/distributions/base-installer.ts
index 10e37d996..5d9f3c82a 100644
--- a/src/distributions/base-installer.ts
+++ b/src/distributions/base-installer.ts
@@ -292,7 +292,9 @@ export abstract class JavaBase {
       }
     }
 
-    return new Error(parts.join('\n'));
+    const error = new Error(parts.join('\n'));
+    error.name = 'VersionNotFoundError';
+    return error;
   }
 
   protected setJavaDefault(version: string, toolPath: string) {
diff --git a/src/distributions/semeru/installer.ts b/src/distributions/semeru/installer.ts
index edb294803..a043f16e4 100644
--- a/src/distributions/semeru/installer.ts
+++ b/src/distributions/semeru/installer.ts
@@ -7,9 +7,12 @@ import {
 import semver from 'semver';
 import {
   extractJdkFile,
+  getNextPageUrlFromLinkHeader,
   getDownloadArchiveExtension,
   isVersionSatisfies,
-  renameWinArchive
+  renameWinArchive,
+  MAX_PAGINATION_PAGES,
+  validatePaginationUrl
 } from '../../util';
 import * as core from '@actions/core';
 import * as tc from '@actions/tool-cache';
@@ -155,32 +158,46 @@ export class SemeruDistribution extends JavaBase {
       `jvm_impl=openj9`
     ].join('&');
 
-    // need to iterate through all pages to retrieve the list of all versions
-    // Adoptium API doesn't provide way to retrieve the count of pages to iterate so infinity loop
-    let page_index = 0;
+    const requestArguments = `${baseRequestArguments}&page_size=20&page=0`;
+    let availableVersionsUrl: string | null =
+      `https://api.adoptopenjdk.net/v3/assets/version/${versionRange}?${requestArguments}`;
     const availableVersions: ISemeruAvailableVersions[] = [];
-    while (true) {
-      const requestArguments = `${baseRequestArguments}&page_size=20&page=${page_index}`;
-      const availableVersionsUrl = `https://api.adoptopenjdk.net/v3/assets/version/${versionRange}?${requestArguments}`;
-      if (core.isDebug() && page_index === 0) {
-        // url is identical except page_index so print it once for debug
-        core.debug(
-          `Gathering available versions from '${availableVersionsUrl}'`
-        );
-      }
+    let pageCount = 0;
+    if (core.isDebug()) {
+      core.debug(`Gathering available versions from '${availableVersionsUrl}'`);
+    }
 
-      const paginationPage = (
+    while (availableVersionsUrl) {
+      pageCount++;
+      const response =
         await this.http.getJson<ISemeruAvailableVersions[]>(
           availableVersionsUrl
-        )
-      ).result;
+        );
+      const paginationPage = response.result;
+      const nextUrl = getNextPageUrlFromLinkHeader(response.headers);
+      if (
+        nextUrl &&
+        !validatePaginationUrl(nextUrl, 'https://api.adoptopenjdk.net')
+      ) {
+        core.warning(
+          `Ignoring pagination link with unexpected origin: ${nextUrl}`
+        );
+        availableVersionsUrl = null;
+      } else {
+        availableVersionsUrl = nextUrl;
+      }
       if (paginationPage === null || paginationPage.length === 0) {
-        // break infinity loop because we have reached end of pagination
         break;
       }
 
       availableVersions.push(...paginationPage);
-      page_index++;
+
+      if (pageCount >= MAX_PAGINATION_PAGES) {
+        core.warning(
+          `Reached pagination safeguard limit (${MAX_PAGINATION_PAGES} pages) while listing Semeru releases.`
+        );
+        break;
+      }
     }
 
     if (core.isDebug()) {
diff --git a/src/distributions/temurin/installer.ts b/src/distributions/temurin/installer.ts
index 51d523f6e..109c2d413 100644
--- a/src/distributions/temurin/installer.ts
+++ b/src/distributions/temurin/installer.ts
@@ -14,9 +14,12 @@ import {
 } from '../base-models';
 import {
   extractJdkFile,
+  getNextPageUrlFromLinkHeader,
   getDownloadArchiveExtension,
   isVersionSatisfies,
-  renameWinArchive
+  renameWinArchive,
+  MAX_PAGINATION_PAGES,
+  validatePaginationUrl
 } from '../../util';
 
 export enum TemurinImplementation {
@@ -31,7 +34,10 @@ export class TemurinDistribution extends JavaBase {
     super(`Temurin-${jvmImpl}`, installerOptions);
   }
 
-  protected async findPackageForDownload(
+  /**
+   * @internal For cross-distribution reuse only. Not intended as a public API.
+   */
+  public async findPackageForDownload(
     version: string
   ): Promise<JavaDownloadRelease> {
     const availableVersionsRaw = await this.getAvailableVersions();
@@ -123,32 +129,47 @@ export class TemurinDistribution extends JavaBase {
       `jvm_impl=${this.jvmImpl.toLowerCase()}`
     ].join('&');
 
-    // need to iterate through all pages to retrieve the list of all versions
-    // Adoptium API doesn't provide way to retrieve the count of pages to iterate so infinity loop
-    let page_index = 0;
+    const requestArguments = `${baseRequestArguments}&page_size=20&page=0`;
+    let availableVersionsUrl: string | null =
+      `https://api.adoptium.net/v3/assets/version/${versionRange}?${requestArguments}`;
     const availableVersions: ITemurinAvailableVersions[] = [];
-    while (true) {
-      const requestArguments = `${baseRequestArguments}&page_size=20&page=${page_index}`;
-      const availableVersionsUrl = `https://api.adoptium.net/v3/assets/version/${versionRange}?${requestArguments}`;
-      if (core.isDebug() && page_index === 0) {
-        // url is identical except page_index so print it once for debug
-        core.debug(
-          `Gathering available versions from '${availableVersionsUrl}'`
-        );
-      }
+    let pageCount = 0;
+    if (core.isDebug()) {
+      core.debug(`Gathering available versions from '${availableVersionsUrl}'`);
+    }
 
-      const paginationPage = (
+    while (availableVersionsUrl) {
+      pageCount++;
+      const response =
         await this.http.getJson<ITemurinAvailableVersions[]>(
           availableVersionsUrl
-        )
-      ).result;
+        );
+      const paginationPage = response.result;
+      const nextUrl = getNextPageUrlFromLinkHeader(response.headers);
+      if (
+        nextUrl &&
+        !validatePaginationUrl(nextUrl, 'https://api.adoptium.net')
+      ) {
+        core.warning(
+          `Ignoring pagination link with unexpected origin: ${nextUrl}`
+        );
+        availableVersionsUrl = null;
+      } else {
+        availableVersionsUrl = nextUrl;
+      }
+
       if (paginationPage === null || paginationPage.length === 0) {
-        // break infinity loop because we have reached end of pagination
         break;
       }
 
       availableVersions.push(...paginationPage);
-      page_index++;
+
+      if (pageCount >= MAX_PAGINATION_PAGES) {
+        core.warning(
+          `Reached pagination safeguard limit (${MAX_PAGINATION_PAGES} pages) while listing Temurin releases.`
+        );
+        break;
+      }
     }
 
     if (core.isDebug()) {
diff --git a/src/util.ts b/src/util.ts
index 0325f7f42..5fe84c520 100644
--- a/src/util.ts
+++ b/src/util.ts
@@ -201,6 +201,55 @@ export function getGitHubHttpHeaders(): OutgoingHttpHeaders {
   return headers;
 }
 
+export const MAX_PAGINATION_PAGES = 1000;
+
+export function getNextPageUrlFromLinkHeader(
+  headers?: Record<string, string | string[] | undefined>
+): string | null {
+  if (!headers) {
+    return null;
+  }
+
+  const linkHeader = headers.link ?? headers.Link;
+  if (!linkHeader) {
+    return null;
+  }
+
+  const normalizedLinkHeader = Array.isArray(linkHeader)
+    ? linkHeader.join(',')
+    : linkHeader;
+
+  // Split into individual link-values and find the one with rel="next"
+  // RFC 8288 allows rel to appear anywhere among the parameters
+  const linkValues = normalizedLinkHeader.split(/,(?=\s*<)/);
+  for (const linkValue of linkValues) {
+    const urlMatch = linkValue.match(/<([^>]+)>/);
+    if (!urlMatch) continue;
+
+    const params = linkValue.slice(urlMatch[0].length);
+    // Use word boundary to match "next" as a standalone relation type
+    // RFC 8288 allows space-separated relation types like rel="next prev"
+    if (/;\s*rel="?[^"]*\bnext\b/i.test(params)) {
+      return urlMatch[1];
+    }
+  }
+
+  return null;
+}
+
+export function validatePaginationUrl(
+  url: string,
+  allowedOrigin: string
+): boolean {
+  try {
+    const parsed = new URL(url);
+    const allowed = new URL(allowedOrigin);
+    return parsed.origin === allowed.origin;
+  } catch {
+    return false;
+  }
+}
+
 // Rename archive to add extension because after downloading
 // archive does not contain extension type and it leads to some issues
 // on Windows runners without PowerShell Core.