diff --git a/.github/workflows/formal.yml b/.github/workflows/formal.yml
index 26bcc74542..8df31d1751 100644
--- a/.github/workflows/formal.yml
+++ b/.github/workflows/formal.yml
@@ -3,6 +3,9 @@ name: Test Formalities
 on:
   pull_request:
 
+permissions:
+  contents: read
+
 jobs:
   build:
     name: Test Formalities
diff --git a/.github/workflows/kernel.yml b/.github/workflows/kernel.yml
index 99b8aefbe1..0ba8c27e2e 100644
--- a/.github/workflows/kernel.yml
+++ b/.github/workflows/kernel.yml
@@ -7,6 +7,10 @@ on:
       - 'include/kernel-*'
       - 'package/kernel/**'
       - 'target/linux/generic/**'
+
+permissions:
+  contents: read
+
 jobs:
   determine_targets:
     name: Set targets
diff --git a/.github/workflows/labeler.yml b/.github/workflows/labeler.yml
index 5eecf69023..5f82b88a50 100644
--- a/.github/workflows/labeler.yml
+++ b/.github/workflows/labeler.yml
@@ -2,8 +2,15 @@ name: 'Pull Request Labeler'
 on:
   - pull_request_target
 
+permissions:
+  contents: read
+
 jobs:
   labeler:
+    permissions:
+      contents: read # to determine modified files (actions/labeler)
+      pull-requests: write # to add labels to PRs (actions/labeler)
+
     name: Pull Request Labeler
     runs-on: ubuntu-latest
     steps:
diff --git a/.github/workflows/tools.yml b/.github/workflows/tools.yml
index 39adac5beb..f483615363 100644
--- a/.github/workflows/tools.yml
+++ b/.github/workflows/tools.yml
@@ -10,6 +10,9 @@ on:
       - 'tools/**'
       - '.github/workflows/tools.yml'
 
+permissions:
+  contents: read
+
 jobs:
   build-macos-latest:
     if: github.event_name != 'push'