diff --git a/.github/workflows/osv-scanner-unified.yml b/.github/workflows/osv-scanner-unified.yml
index 1c6ba2c2c2..1c3c60e1c5 100644
--- a/.github/workflows/osv-scanner-unified.yml
+++ b/.github/workflows/osv-scanner-unified.yml
@@ -23,16 +23,17 @@ on:
   push:
     branches: ["master"]
 
-permissions:
-  # Required to upload SARIF file to CodeQL. See: https://github.com/github/codeql-action/issues/2117
-  actions: read
-  # Require writing security events to upload SARIF file to security tab
-  security-events: write
-  # Read commit contents
-  contents: read
+# Declare default permissions as read only.
+permissions: read-all
+  
 
 jobs:
   scan-scheduled:
+    permissions:
+      # Required for writing security events to upload SARIF file to security tab
+      security-events: write
+      actions: read
+      contents: read
     if: ${{ github.event_name == 'push' || github.event_name == 'schedule' }}
     # If you want to copy this config, highly suggest pinning this version to a release rather than tracking the main branch
     uses: "google/osv-scanner-action/.github/workflows/osv-scanner-reusable.yml@8bd1ce1c4be9d98053ffd9e6e14585276a36762c" # v1.9.1
@@ -43,6 +44,11 @@ jobs:
         --skip-git
         ./
   scan-pr:
+    permissions:
+      # Required for writing security events to upload SARIF file to security tab
+      security-events: write
+      actions: read
+      contents: read
     if: ${{ github.event_name == 'pull_request' || github.event_name == 'merge_group' }}
     # If you want to copy this config, highly suggest pinning this version to a release rather than tracking the main branch
     uses: "google/osv-scanner-action/.github/workflows/osv-scanner-reusable-pr.yml@8bd1ce1c4be9d98053ffd9e6e14585276a36762c" # v1.9.1