diff --git a/.github/workflows/ci-workflow.yml b/.github/workflows/ci-workflow.yml
index d71b26d08e23..bbdf6f5bee00 100644
--- a/.github/workflows/ci-workflow.yml
+++ b/.github/workflows/ci-workflow.yml
@@ -49,6 +49,9 @@ concurrency:
   group: ${{ github.ref }}
   cancel-in-progress: true
 
+permissions:
+  contents: read
+
 jobs:
   static-analysis:
     timeout-minutes: 30
diff --git a/.github/workflows/stale.yml b/.github/workflows/stale.yml
index 89d6b2ab1686..fe7cb6a8722b 100644
--- a/.github/workflows/stale.yml
+++ b/.github/workflows/stale.yml
@@ -20,8 +20,14 @@ on:
   schedule:
     - cron: "0 0 * * *"
 
+permissions:
+  contents: read
+
 jobs:
   stale:
+    permissions:
+      issues: write  # for actions/stale to close stale issues
+      pull-requests: write  # for actions/stale to close stale PRs
     runs-on: ubuntu-latest
     steps:
       - uses: actions/stale@v3
diff --git a/.github/workflows/system-tests.yml b/.github/workflows/system-tests.yml
index 1bfc6ff32a1e..42a939530c49 100644
--- a/.github/workflows/system-tests.yml
+++ b/.github/workflows/system-tests.yml
@@ -52,6 +52,9 @@ env:
     -pl nifi-system-tests/nifi-system-test-suite
     -pl nifi-system-tests/nifi-stateless-system-test-suite
 
+permissions:
+  contents: read
+
 jobs:
   ubuntu-17:
     timeout-minutes: 120