diff --git a/.github/workflows/sast.yml b/.github/workflows/sast.yml
new file mode 100644
index 00000000..ea6351bf
--- /dev/null
+++ b/.github/workflows/sast.yml
@@ -0,0 +1,50 @@
+name: SAST — Semgrep
+
+on:
+  push:
+    branches: [main]
+    paths:
+      - 'app/app/**'
+      - 'app/resources/js/**'
+      - 'app/database/migrations/**'
+      - '.semgrep.yml'
+      - '.github/workflows/sast.yml'
+  pull_request:
+    branches: [main]
+    paths:
+      - 'app/app/**'
+      - 'app/resources/js/**'
+      - 'app/database/migrations/**'
+
+permissions:
+  contents: read
+  security-events: write
+
+jobs:
+  semgrep:
+    runs-on: ubuntu-latest
+    name: Semgrep SAST scan
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Run Semgrep
+        uses: semgrep/semgrep-action@v1
+        with:
+          config: >-
+            p/php
+            p/javascript
+            p/typescript
+            p/secrets
+        env:
+          # SEMGREP_APP_TOKEN — опциональный, для Semgrep Cloud dashboard.
+          # Без него: open-source режим, результаты только в GitHub Security tab.
+          # Добавить: GitHub → Settings → Secrets → Actions → SEMGREP_APP_TOKEN
+          SEMGREP_APP_TOKEN: ${{ secrets.SEMGREP_APP_TOKEN }}
+
+      - name: Upload SARIF to GitHub Security tab
+        uses: github/codeql-action/upload-sarif@v3
+        if: always()
+        with:
+          sarif_file: semgrep.sarif
+        continue-on-error: true