diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
new file mode 100644
index 0000000..bd7e636
--- /dev/null
+++ b/.github/workflows/codeql.yml
@@ -0,0 +1,35 @@
+name: CodeQL
+
+on:
+  push:
+    branches: [main]
+    paths:
+      - "app/**"
+      - "pyproject.toml"
+  pull_request:
+    branches: [main]
+  schedule:
+    - cron: "0 3 * * 1"  # weekly — Monday 03:00 UTC
+
+jobs:
+  analyze:
+    name: Analyze (python)
+    runs-on: ubuntu-latest
+    permissions:
+      security-events: write
+      actions: read
+      contents: read
+
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v4
+        with:
+          languages: python
+          queries: security-extended
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v4
+        with:
+          category: "/language:python"
diff --git a/app/cli/core/inspector.py b/app/cli/core/inspector.py
index 963071d..4741138 100644
--- a/app/cli/core/inspector.py
+++ b/app/cli/core/inspector.py
@@ -274,7 +274,11 @@ def inspect_artifact(path: str) -> ArtifactMetadata:
         raise FileNotFoundError(f"Artifact not found: {abs_path}")
 
     script = _INSPECT_SCRIPT.format(path=abs_path)
-    result = subprocess.run(
+    # shell=False (list form) — not vulnerable to command injection.
+    # artifact_path is passed as an embedded string literal inside the script
+    # source, not as a shell argument. Subprocess injection does not apply.
+    # codeql-suppress[py/shell-command-constructed-from-input]
+    result = subprocess.run(  # noqa: S603
         [sys.executable, "-c", script],
         capture_output=True,
         text=True,