diff --git a/code-scanning/codescan.yml b/code-scanning/codescan.yml
index 3b24d9f..92707b1 100644
--- a/code-scanning/codescan.yml
+++ b/code-scanning/codescan.yml
@@ -17,8 +17,14 @@ on:
   schedule:
     - cron: $cron-weekly
 
+permissions:
+  contents: read
+
 jobs:
     CodeScan:
+        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:
             -   name: Checkout repository
diff --git a/code-scanning/snyk-infrastructure.yml b/code-scanning/snyk-infrastructure.yml
index f4e9b8c..a685323 100644
--- a/code-scanning/snyk-infrastructure.yml
+++ b/code-scanning/snyk-infrastructure.yml
@@ -21,8 +21,14 @@ on:
   schedule:
     - cron: $cron-weekly
 
+permissions:
+  contents: read
+
 jobs:
   snyk:
+    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:
       - uses: actions/checkout@v3
diff --git a/code-scanning/xanitizer.yml b/code-scanning/xanitizer.yml
index 48249fc..3462eaa 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:
diff --git a/deployments/alibabacloud.yml b/deployments/alibabacloud.yml
index 841a2fd..d7c27d9 100644
--- a/deployments/alibabacloud.yml
+++ b/deployments/alibabacloud.yml
@@ -40,6 +40,9 @@ env:
   ACR_EE_IMAGE: repo
   ACR_EE_TAG: ${{ github.sha }}
 
+permissions:
+  contents: read
+
 jobs:
   build:
     runs-on: ubuntu-latest