diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
new file mode 100644
index 0000000..ab5275c
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+++ b/.github/workflows/codeql.yml
@@ -0,0 +1,36 @@
+# SPDX-FileCopyrightText: 2026 LibreCode coop and contributors
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+name: CodeQL
+
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+  schedule:
+    - cron: '31 5 * * 3'
+
+permissions:
+  contents: read
+  security-events: write
+
+jobs:
+  codeql:
+    name: CodeQL
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@1c5b675653bb5c22dbe9b12b556ec555138e09fd # v4.38.1
+        with:
+          languages: javascript-typescript
+
+      - name: Analyze
+        uses: github/codeql-action/analyze@1c5b675653bb5c22dbe9b12b556ec555138e09fd # v4.38.1