diff --git a/.github/actions/check-sarif/action.yml b/.github/actions/check-sarif/action.yml
index 89ff9d703e..bfa1c3b9d1 100644
--- a/.github/actions/check-sarif/action.yml
+++ b/.github/actions/check-sarif/action.yml
@@ -16,5 +16,5 @@ inputs:
       Comma separated list of query ids that should NOT be included in this SARIF file.
 
 runs:
-  using: node20
+  using: node24
   main: index.js
diff --git a/.github/workflows/codescanning-config-cli.yml b/.github/workflows/codescanning-config-cli.yml
index c6dc41f299..0c6213e9e7 100644
--- a/.github/workflows/codescanning-config-cli.yml
+++ b/.github/workflows/codescanning-config-cli.yml
@@ -58,7 +58,7 @@ jobs:
     - name: Set up Node.js
       uses: actions/setup-node@v5
       with:
-        node-version: '20'
+        node-version: 24
         cache: 'npm'
 
     - name: Install dependencies
diff --git a/.github/workflows/pr-checks.yml b/.github/workflows/pr-checks.yml
index 2fd737de86..376730e386 100644
--- a/.github/workflows/pr-checks.yml
+++ b/.github/workflows/pr-checks.yml
@@ -20,6 +20,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
+        node-version: [20, 24]
     permissions:
       contents: read
       security-events: write # needed to upload ESLint results
@@ -36,7 +37,7 @@ jobs:
       - name: Set up Node.js
         uses: actions/setup-node@v5
         with:
-          node-version: '20.x'
+          node-version: ${{ matrix.node-version }}
           cache: 'npm'
 
       - name: Set up Python
@@ -73,7 +74,7 @@ jobs:
 
       - name: Upload sarif
         uses: github/codeql-action/upload-sarif@v3
-        if: matrix.os == 'ubuntu-latest'
+        if: matrix.os == 'ubuntu-latest' && matrix.node-version == 24
         with:
           sarif_file: eslint.sarif
           category: eslint
diff --git a/.github/workflows/query-filters.yml b/.github/workflows/query-filters.yml
index aabcc144b0..fa89d2d935 100644
--- a/.github/workflows/query-filters.yml
+++ b/.github/workflows/query-filters.yml
@@ -34,7 +34,7 @@ jobs:
     - name: Install Node.js
       uses: actions/setup-node@v5
       with:
-        node-version: 20.x
+        node-version: 24
         cache: npm
 
     - name: Install dependencies
diff --git a/.github/workflows/update-bundle.yml b/.github/workflows/update-bundle.yml
index e64135d841..6705d7d14b 100644
--- a/.github/workflows/update-bundle.yml
+++ b/.github/workflows/update-bundle.yml
@@ -43,7 +43,7 @@ jobs:
       - name: Set up Node.js
         uses: actions/setup-node@v5
         with:
-          node-version: '20.x'
+          node-version: 24
           cache: 'npm'
 
       - name: Install dependencies
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3b0da85e36..37bca4058a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,7 @@ See the [releases page](https://github.com/github/codeql-action/releases) for th
 
 ## [UNRELEASED]
 
-No user facing changes.
+- [v4+ only] The CodeQL Action now runs on Node.js v24. [#3169](https://github.com/github/codeql-action/pull/3169)
 
 ## 3.30.6 - 02 Oct 2025
 
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 493ae847cf..13614cb011 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -13,7 +13,7 @@ Please note that this project is released with a [Contributor Code of Conduct][c
 
 ## Development and Testing
 
-Before you start, ensure that you have a recent version of node (16 or higher) installed, along with a recent version of npm (9.2 or higher). You can see which version of node is used by the action in `init/action.yml`.
+Before you start, ensure that you have a recent version of node (24 or higher) installed, along with a recent version of npm (9.2 or higher). You can see which version of node is used by the action in `init/action.yml`.
 
 ### Common tasks
 
diff --git a/README.md b/README.md
index c5b8eab811..d4e5320b3b 100644
--- a/README.md
+++ b/README.md
@@ -62,7 +62,8 @@ For compiled languages:
 
 The following versions of the CodeQL Action are currently supported:
 
-- v3 (latest)
+- v4 (latest)
+- v3
 
 ## Supported versions of the CodeQL Bundle on GitHub Enterprise Server
 
diff --git a/analyze/action.yml b/analyze/action.yml
index b7880be179..7fc118b156 100644
--- a/analyze/action.yml
+++ b/analyze/action.yml
@@ -92,6 +92,6 @@ outputs:
   sarif-id:
     description: The ID of the uploaded SARIF file.
 runs:
-  using: node20
+  using: node24
   main: "../lib/analyze-action.js"
   post: "../lib/analyze-action-post.js"
diff --git a/autobuild/action.yml b/autobuild/action.yml
index 80d8c1c31e..c820fb5aff 100644
--- a/autobuild/action.yml
+++ b/autobuild/action.yml
@@ -15,5 +15,5 @@ inputs:
       $GITHUB_WORKSPACE as its working directory.
     required: false
 runs:
-  using: node20
+  using: node24
   main: '../lib/autobuild-action.js'
diff --git a/init/action.yml b/init/action.yml
index ba5d6efcc1..57d5a99402 100644
--- a/init/action.yml
+++ b/init/action.yml
@@ -165,6 +165,6 @@ outputs:
   codeql-version:
     description: The version of the CodeQL binary used for analysis
 runs:
-  using: node20
+  using: node24
   main: '../lib/init-action.js'
   post: '../lib/init-action-post.js'
diff --git a/lib/analyze-action-post.js b/lib/analyze-action-post.js
index a9b163bc16..387d267412 100644
--- a/lib/analyze-action-post.js
+++ b/lib/analyze-action-post.js
@@ -26438,7 +26438,7 @@ var require_package = __commonJS({
   "package.json"(exports2, module2) {
     module2.exports = {
       name: "codeql",
-      version: "3.30.7",
+      version: "4.30.7",
       private: true,
       description: "CodeQL action",
       scripts: {
diff --git a/lib/analyze-action.js b/lib/analyze-action.js
index c2788900b3..f79eb441ee 100644
--- a/lib/analyze-action.js
+++ b/lib/analyze-action.js
@@ -32287,7 +32287,7 @@ var require_package = __commonJS({
   "package.json"(exports2, module2) {
     module2.exports = {
       name: "codeql",
-      version: "3.30.7",
+      version: "4.30.7",
       private: true,
       description: "CodeQL action",
       scripts: {
diff --git a/lib/autobuild-action.js b/lib/autobuild-action.js
index 4cde47d65b..eaf12707cb 100644
--- a/lib/autobuild-action.js
+++ b/lib/autobuild-action.js
@@ -26438,7 +26438,7 @@ var require_package = __commonJS({
   "package.json"(exports2, module2) {
     module2.exports = {
       name: "codeql",
-      version: "3.30.7",
+      version: "4.30.7",
       private: true,
       description: "CodeQL action",
       scripts: {
diff --git a/lib/init-action-post.js b/lib/init-action-post.js
index e138420a3e..80a42870fe 100644
--- a/lib/init-action-post.js
+++ b/lib/init-action-post.js
@@ -32287,7 +32287,7 @@ var require_package = __commonJS({
   "package.json"(exports2, module2) {
     module2.exports = {
       name: "codeql",
-      version: "3.30.7",
+      version: "4.30.7",
       private: true,
       description: "CodeQL action",
       scripts: {
diff --git a/lib/init-action.js b/lib/init-action.js
index 2f509ad0ee..878d7dacae 100644
--- a/lib/init-action.js
+++ b/lib/init-action.js
@@ -32287,7 +32287,7 @@ var require_package = __commonJS({
   "package.json"(exports2, module2) {
     module2.exports = {
       name: "codeql",
-      version: "3.30.7",
+      version: "4.30.7",
       private: true,
       description: "CodeQL action",
       scripts: {
diff --git a/lib/resolve-environment-action.js b/lib/resolve-environment-action.js
index 67cb394e74..8cd476ad47 100644
--- a/lib/resolve-environment-action.js
+++ b/lib/resolve-environment-action.js
@@ -26438,7 +26438,7 @@ var require_package = __commonJS({
   "package.json"(exports2, module2) {
     module2.exports = {
       name: "codeql",
-      version: "3.30.7",
+      version: "4.30.7",
       private: true,
       description: "CodeQL action",
       scripts: {
diff --git a/lib/start-proxy-action-post.js b/lib/start-proxy-action-post.js
index a52eadfc51..8b7af1f861 100644
--- a/lib/start-proxy-action-post.js
+++ b/lib/start-proxy-action-post.js
@@ -26438,7 +26438,7 @@ var require_package = __commonJS({
   "package.json"(exports2, module2) {
     module2.exports = {
       name: "codeql",
-      version: "3.30.7",
+      version: "4.30.7",
       private: true,
       description: "CodeQL action",
       scripts: {
diff --git a/lib/start-proxy-action.js b/lib/start-proxy-action.js
index f262402cf9..973e6bda1a 100644
--- a/lib/start-proxy-action.js
+++ b/lib/start-proxy-action.js
@@ -44974,7 +44974,7 @@ var require_package = __commonJS({
   "package.json"(exports2, module2) {
     module2.exports = {
       name: "codeql",
-      version: "3.30.7",
+      version: "4.30.7",
       private: true,
       description: "CodeQL action",
       scripts: {
diff --git a/lib/upload-lib.js b/lib/upload-lib.js
index a6342ff212..df30877d4a 100644
--- a/lib/upload-lib.js
+++ b/lib/upload-lib.js
@@ -33584,7 +33584,7 @@ var require_package = __commonJS({
   "package.json"(exports2, module2) {
     module2.exports = {
       name: "codeql",
-      version: "3.30.7",
+      version: "4.30.7",
       private: true,
       description: "CodeQL action",
       scripts: {
diff --git a/lib/upload-sarif-action-post.js b/lib/upload-sarif-action-post.js
index 233b73d473..ea63c44749 100644
--- a/lib/upload-sarif-action-post.js
+++ b/lib/upload-sarif-action-post.js
@@ -26438,7 +26438,7 @@ var require_package = __commonJS({
   "package.json"(exports2, module2) {
     module2.exports = {
       name: "codeql",
-      version: "3.30.7",
+      version: "4.30.7",
       private: true,
       description: "CodeQL action",
       scripts: {
diff --git a/lib/upload-sarif-action.js b/lib/upload-sarif-action.js
index 7ad72583b5..78a21eff3b 100644
--- a/lib/upload-sarif-action.js
+++ b/lib/upload-sarif-action.js
@@ -32287,7 +32287,7 @@ var require_package = __commonJS({
   "package.json"(exports2, module2) {
     module2.exports = {
       name: "codeql",
-      version: "3.30.7",
+      version: "4.30.7",
       private: true,
       description: "CodeQL action",
       scripts: {
diff --git a/package-lock.json b/package-lock.json
index 911e99ad4d..e4854d5dd5 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "codeql",
-  "version": "3.30.7",
+  "version": "4.30.7",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "codeql",
-      "version": "3.30.7",
+      "version": "4.30.7",
       "license": "MIT",
       "dependencies": {
         "@actions/artifact": "^2.3.1",
diff --git a/package.json b/package.json
index 32b427bb41..9dc0420b3f 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "codeql",
-  "version": "3.30.7",
+  "version": "4.30.7",
   "private": true,
   "description": "CodeQL action",
   "scripts": {
diff --git a/resolve-environment/action.yml b/resolve-environment/action.yml
index 188e5fd174..0734fcfa44 100644
--- a/resolve-environment/action.yml
+++ b/resolve-environment/action.yml
@@ -21,5 +21,5 @@ outputs:
   environment:
     description: The inferred build environment configuration.
 runs:
-  using: node20
+  using: node24
   main: '../lib/resolve-environment-action.js'
diff --git a/src/autobuild.ts b/src/autobuild.ts
index 1812e35017..ce3d45cc4e 100644
--- a/src/autobuild.ts
+++ b/src/autobuild.ts
@@ -52,11 +52,11 @@ export async function determineAutobuildLanguages(
    * For example, consider a user with the following workflow file:
    *
    * ```yml
-   * - uses: github/codeql-action/init@v3
+   * - uses: github/codeql-action/init@v4
    *   with:
    *     languages: go, java
-   * - uses: github/codeql-action/autobuild@v3
-   * - uses: github/codeql-action/analyze@v3
+   * - uses: github/codeql-action/autobuild@v4
+   * - uses: github/codeql-action/analyze@v4
    * ```
    *
    * - With Go extraction disabled, we will run the Java autobuilder in the
diff --git a/src/init-action-post-helper.test.ts b/src/init-action-post-helper.test.ts
index 72a828a33f..1c1cbcb684 100644
--- a/src/init-action-post-helper.test.ts
+++ b/src/init-action-post-helper.test.ts
@@ -84,14 +84,14 @@ test("uploads failed SARIF run with `diagnostics export` if feature flag is off"
     },
     {
       name: "Initialize CodeQL",
-      uses: "github/codeql-action/init@v3",
+      uses: "github/codeql-action/init@v4",
       with: {
         languages: "javascript",
       },
     },
     {
       name: "Perform CodeQL Analysis",
-      uses: "github/codeql-action/analyze@v3",
+      uses: "github/codeql-action/analyze@v4",
       with: {
         category: "my-category",
       },
@@ -108,14 +108,14 @@ test("uploads failed SARIF run with `diagnostics export` if the database doesn't
     },
     {
       name: "Initialize CodeQL",
-      uses: "github/codeql-action/init@v3",
+      uses: "github/codeql-action/init@v4",
       with: {
         languages: "javascript",
       },
     },
     {
       name: "Perform CodeQL Analysis",
-      uses: "github/codeql-action/analyze@v3",
+      uses: "github/codeql-action/analyze@v4",
       with: {
         category: "my-category",
       },
@@ -135,14 +135,14 @@ test("uploads failed SARIF run with database export-diagnostics if the database
     },
     {
       name: "Initialize CodeQL",
-      uses: "github/codeql-action/init@v3",
+      uses: "github/codeql-action/init@v4",
       with: {
         languages: "javascript",
       },
     },
     {
       name: "Perform CodeQL Analysis",
-      uses: "github/codeql-action/analyze@v3",
+      uses: "github/codeql-action/analyze@v4",
       with: {
         category: "my-category",
       },
@@ -192,14 +192,14 @@ for (const { uploadInput, shouldUpload } of UPLOAD_INPUT_TEST_CASES) {
       },
       {
         name: "Initialize CodeQL",
-        uses: "github/codeql-action/init@v3",
+        uses: "github/codeql-action/init@v4",
         with: {
           languages: "javascript",
         },
       },
       {
         name: "Perform CodeQL Analysis",
-        uses: "github/codeql-action/analyze@v3",
+        uses: "github/codeql-action/analyze@v4",
         with: {
           category: "my-category",
           upload: uploadInput,
@@ -227,14 +227,14 @@ test("uploading failed SARIF run succeeds when workflow uses an input with a mat
     },
     {
       name: "Initialize CodeQL",
-      uses: "github/codeql-action/init@v3",
+      uses: "github/codeql-action/init@v4",
       with: {
         languages: "javascript",
       },
     },
     {
       name: "Perform CodeQL Analysis",
-      uses: "github/codeql-action/analyze@v3",
+      uses: "github/codeql-action/analyze@v4",
       with: {
         category: "/language:${{ matrix.language }}",
       },
@@ -254,14 +254,14 @@ test("uploading failed SARIF run fails when workflow uses a complex upload input
     },
     {
       name: "Initialize CodeQL",
-      uses: "github/codeql-action/init@v3",
+      uses: "github/codeql-action/init@v4",
       with: {
         languages: "javascript",
       },
     },
     {
       name: "Perform CodeQL Analysis",
-      uses: "github/codeql-action/analyze@v3",
+      uses: "github/codeql-action/analyze@v4",
       with: {
         upload: "${{ matrix.language != 'csharp' }}",
       },
diff --git a/src/workflow.test.ts b/src/workflow.test.ts
index 9af81459ef..e922d8079c 100644
--- a/src/workflow.test.ts
+++ b/src/workflow.test.ts
@@ -395,9 +395,9 @@ async function testLanguageAliases(
             },
           },
           steps: [
-            { uses: "actions/checkout@v3" },
-            { uses: "github/codeql-action/init@v3" },
-            { uses: "github/codeql-action/analyze@v3" },
+            { uses: "actions/checkout@v4" },
+            { uses: "github/codeql-action/init@v4" },
+            { uses: "github/codeql-action/analyze@v4" },
           ],
         },
       },
@@ -666,7 +666,7 @@ test("getWorkflowErrors() should report a warning if different versions of the C
         analyze:
           steps:
             - uses: github/codeql-action/init@v2
-            - uses: github/codeql-action/analyze@v3
+            - uses: github/codeql-action/analyze@v4
     `) as Workflow,
     await getCodeQLForTesting(),
   );
@@ -686,8 +686,8 @@ test("getWorkflowErrors() should not report a warning if the same versions of th
       jobs:
         analyze:
           steps:
-            - uses: github/codeql-action/init@v3
-            - uses: github/codeql-action/analyze@v3
+            - uses: github/codeql-action/init@v4
+            - uses: github/codeql-action/analyze@v4
     `) as Workflow,
     await getCodeQLForTesting(),
   );
@@ -706,7 +706,7 @@ test("getWorkflowErrors() should not report a warning involving versions of othe
         analyze:
           steps:
             - uses: actions/checkout@v5
-            - uses: github/codeql-action/init@v3
+            - uses: github/codeql-action/init@v4
     `) as Workflow,
     await getCodeQLForTesting(),
   );
@@ -723,9 +723,9 @@ test("getCategoryInputOrThrow returns category for simple workflow with category
           analysis:
             runs-on: ubuntu-latest
             steps:
-              - uses: actions/checkout@v3
-              - uses: github/codeql-action/init@v3
-              - uses: github/codeql-action/analyze@v3
+              - uses: actions/checkout@v4
+              - uses: github/codeql-action/init@v4
+              - uses: github/codeql-action/analyze@v4
                 with:
                   category: some-category
       `) as Workflow,
@@ -745,9 +745,9 @@ test("getCategoryInputOrThrow returns undefined for simple workflow without cate
           analysis:
             runs-on: ubuntu-latest
             steps:
-              - uses: actions/checkout@v3
-              - uses: github/codeql-action/init@v3
-              - uses: github/codeql-action/analyze@v3
+              - uses: actions/checkout@v4
+              - uses: github/codeql-action/init@v4
+              - uses: github/codeql-action/analyze@v4
       `) as Workflow,
       "analysis",
       {},
@@ -765,19 +765,19 @@ test("getCategoryInputOrThrow returns category for workflow with multiple jobs",
           foo:
             runs-on: ubuntu-latest
             steps:
-              - uses: actions/checkout@v3
-              - uses: github/codeql-action/init@v3
+              - uses: actions/checkout@v4
+              - uses: github/codeql-action/init@v4
               - runs: ./build foo
-              - uses: github/codeql-action/analyze@v3
+              - uses: github/codeql-action/analyze@v4
                 with:
                   category: foo-category
           bar:
             runs-on: ubuntu-latest
             steps:
-              - uses: actions/checkout@v3
-              - uses: github/codeql-action/init@v3
+              - uses: actions/checkout@v4
+              - uses: github/codeql-action/init@v4
               - runs: ./build bar
-              - uses: github/codeql-action/analyze@v3
+              - uses: github/codeql-action/analyze@v4
                 with:
                   category: bar-category
       `) as Workflow,
@@ -800,11 +800,11 @@ test("getCategoryInputOrThrow finds category for workflow with language matrix",
               matrix:
                 language: [javascript, python]
             steps:
-              - uses: actions/checkout@v3
-              - uses: github/codeql-action/init@v3
+              - uses: actions/checkout@v4
+              - uses: github/codeql-action/init@v4
                 with:
                   language: \${{ matrix.language }}
-              - uses: github/codeql-action/analyze@v3
+              - uses: github/codeql-action/analyze@v4
                 with:
                   category: "/language:\${{ matrix.language }}"
       `) as Workflow,
@@ -824,9 +824,9 @@ test("getCategoryInputOrThrow throws error for workflow with dynamic category",
           jobs:
             analysis:
               steps:
-                - uses: actions/checkout@v3
-                - uses: github/codeql-action/init@v3
-                - uses: github/codeql-action/analyze@v3
+                - uses: actions/checkout@v4
+                - uses: github/codeql-action/init@v4
+                - uses: github/codeql-action/analyze@v4
                   with:
                     category: "\${{ github.workflow }}"
         `) as Workflow,
@@ -851,12 +851,12 @@ test("getCategoryInputOrThrow throws error for workflow with multiple calls to a
             analysis:
               runs-on: ubuntu-latest
               steps:
-                - uses: actions/checkout@v3
-                - uses: github/codeql-action/init@v3
-                - uses: github/codeql-action/analyze@v3
+                - uses: actions/checkout@v4
+                - uses: github/codeql-action/init@v4
+                - uses: github/codeql-action/analyze@v4
                   with:
                     category: some-category
-                - uses: github/codeql-action/analyze@v3
+                - uses: github/codeql-action/analyze@v4
                   with:
                     category: another-category
         `) as Workflow,
diff --git a/start-proxy/action.yml b/start-proxy/action.yml
index 17fc3bbe64..275841d9a8 100644
--- a/start-proxy/action.yml
+++ b/start-proxy/action.yml
@@ -29,6 +29,6 @@ outputs:
   proxy_urls:
     description: A stringified JSON array of objects containing the types and URLs of the configured registries.
 runs:
-  using: node20
+  using: node24
   main: "../lib/start-proxy-action.js"
   post: "../lib/start-proxy-action-post.js"
diff --git a/upload-sarif/action.yml b/upload-sarif/action.yml
index cd61886c69..2827891b2e 100644
--- a/upload-sarif/action.yml
+++ b/upload-sarif/action.yml
@@ -41,6 +41,6 @@ outputs:
 
       { "code-scanning": "some-id", "code-quality": "some-other-id" }
 runs:
-  using: node20
+  using: node24
   main: '../lib/upload-sarif-action.js'
   post: '../lib/upload-sarif-action-post.js'