diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 9e4039888..71ba17b6a 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -12,6 +12,9 @@ on:
 env:
   CGO_ENABLED: 0
 
+permissions:
+  contents: read
+
 jobs:
 
   build-webui:
diff --git a/.github/workflows/check_doc.yaml b/.github/workflows/check_doc.yaml
index df4c31b6b..4da20deea 100644
--- a/.github/workflows/check_doc.yaml
+++ b/.github/workflows/check_doc.yaml
@@ -8,6 +8,9 @@ on:
       - '.github/workflows/check_doc.yaml'
       - 'docs/**'
 
+permissions:
+  contents: read
+
 jobs:
 
   docs:
diff --git a/.github/workflows/documentation.yaml b/.github/workflows/documentation.yaml
index 1acae584b..2b6db8395 100644
--- a/.github/workflows/documentation.yaml
+++ b/.github/workflows/documentation.yaml
@@ -11,6 +11,9 @@ env:
   STRUCTOR_VERSION: v1.13.2
   MIXTUS_VERSION: v0.4.1
 
+permissions:
+  contents: read
+
 jobs:
 
   docs:
diff --git a/.github/workflows/experimental.yaml b/.github/workflows/experimental.yaml
index 2ac51f4eb..439b8aa35 100644
--- a/.github/workflows/experimental.yaml
+++ b/.github/workflows/experimental.yaml
@@ -9,6 +9,9 @@ on:
 env:
   CGO_ENABLED: 0
 
+permissions:
+  contents: read
+
 jobs:
 
   build-webui:
diff --git a/.github/workflows/test-gateway-api-conformance.yaml b/.github/workflows/test-gateway-api-conformance.yaml
index 110d5538a..ae07b24be 100644
--- a/.github/workflows/test-gateway-api-conformance.yaml
+++ b/.github/workflows/test-gateway-api-conformance.yaml
@@ -14,6 +14,9 @@ on:
 env:
   CGO_ENABLED: 0
 
+permissions:
+  contents: read
+
 jobs:
 
   test-gateway-api-conformance:
diff --git a/.github/workflows/test-integration.yaml b/.github/workflows/test-integration.yaml
index 30386f28d..d60367fe2 100644
--- a/.github/workflows/test-integration.yaml
+++ b/.github/workflows/test-integration.yaml
@@ -12,6 +12,9 @@ on:
 env:
   CGO_ENABLED: 0
 
+permissions:
+  contents: read
+
 jobs:
 
   build:
diff --git a/.github/workflows/test-knative-conformance.yaml b/.github/workflows/test-knative-conformance.yaml
index ecba548c8..f7b6e2092 100644
--- a/.github/workflows/test-knative-conformance.yaml
+++ b/.github/workflows/test-knative-conformance.yaml
@@ -14,6 +14,9 @@ on:
 env:
   CGO_ENABLED: 0
 
+permissions:
+  contents: read
+
 jobs:
 
   test-knative-conformance:
diff --git a/.github/workflows/test-unit.yaml b/.github/workflows/test-unit.yaml
index 0ca142248..52fcc8413 100644
--- a/.github/workflows/test-unit.yaml
+++ b/.github/workflows/test-unit.yaml
@@ -9,6 +9,9 @@ on:
       - '**.md'
       - 'script/gcg/**'
 
+permissions:
+  contents: read
+
 jobs:
   generate-packages:
     name: List Go Packages
diff --git a/.github/workflows/validate.yaml b/.github/workflows/validate.yaml
index eb02754cc..efcc75daf 100644
--- a/.github/workflows/validate.yaml
+++ b/.github/workflows/validate.yaml
@@ -9,6 +9,9 @@ env:
   GOLANGCI_LINT_VERSION: v2.10.1
   MISSPELL_VERSION: v0.7.0
 
+permissions:
+  contents: read
+
 jobs:
 
   lint: