diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
new file mode 100644
index 0000000..820f1d2
--- /dev/null
+++ b/.github/workflows/codeql.yml
@@ -0,0 +1,49 @@
+name: CodeQL
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+  schedule:
+    - cron: '0 3 * * 1'
+
+jobs:
+  analyze:
+    name: Analyze (${{ matrix.language }})
+    runs-on: ubuntu-latest
+    permissions:
+      security-events: write
+      packages: read
+      actions: read
+      contents: read
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [csharp, actions]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup .NET
+        if: matrix.language == 'csharp'
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: '11.0.x'
+          include-prerelease: true
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v4
+        with:
+          languages: ${{ matrix.language }}
+          build-mode: ${{ matrix.language == 'csharp' && 'autobuild' || 'none' }}
+
+      - name: Autobuild
+        if: matrix.language == 'csharp'
+        uses: github/codeql-action/autobuild@v4
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v4
+        with:
+          category: /language:${{ matrix.language }}