diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
new file mode 100644
index 00000000..ef9e70d9
--- /dev/null
+++ b/.github/workflows/codeql.yml
@@ -0,0 +1,40 @@
+name: CodeQL
+
+on:
+  pull_request:
+  push:
+    branches: [main]
+  schedule:
+    - cron: "17 4 * * 1"
+
+permissions:
+  contents: read
+
+concurrency:
+  group: codeql-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  analyze:
+    name: Analyze (${{ matrix.language }})
+    runs-on: ubuntu-latest
+    timeout-minutes: 20
+    permissions:
+      contents: read
+      security-events: write
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [javascript-typescript, actions, csharp]
+    steps:
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4
+        with:
+          persist-credentials: false
+      - uses: github/codeql-action/init@1c5b675653bb5c22dbe9b12b556ec555138e09fd # v4.38.1
+        with:
+          languages: ${{ matrix.language }}
+          build-mode: none
+          queries: security-extended
+      - uses: github/codeql-action/analyze@1c5b675653bb5c22dbe9b12b556ec555138e09fd # v4.38.1
+        with:
+          category: /language:${{ matrix.language }}