diff --git a/code-scanning/xanitizer.yml b/code-scanning/xanitizer.yml
index 3bfb9ed..1e511aa 100644
--- a/code-scanning/xanitizer.yml
+++ b/code-scanning/xanitizer.yml
@@ -42,9 +42,15 @@ on:
     - cron: $cron-weekly
   workflow_dispatch:
 
+permissions:
+  contents: read
+
 jobs:
   xanitizer-security-analysis:
     # Xanitizer runs on ubuntu-latest and windows-latest.
+    permissions:
+      contents: read # for actions/checkout to fetch code
+      security-events: write # for github/codeql-action/upload-sarif to upload SARIF results
     runs-on: ubuntu-latest
 
     steps: