diff --git a/.github/workflows/beta-java.yml b/.github/workflows/beta-java.yml
index 212c890f..44f41bed 100644
--- a/.github/workflows/beta-java.yml
+++ b/.github/workflows/beta-java.yml
@@ -2,6 +2,8 @@ name: Beta Release (Java)
 on:
   workflow_dispatch:    # Manual trigger ONLY
 
+permissions: read-all
+
 jobs:
   beta:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/ci-java.yml b/.github/workflows/ci-java.yml
index 9fce4340..cdc31c93 100644
--- a/.github/workflows/ci-java.yml
+++ b/.github/workflows/ci-java.yml
@@ -6,9 +6,13 @@ on:
   pull_request:
     branches: [main]
 
+permissions: read-all
+
 jobs:
   build:
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v4.2.2
         with:
diff --git a/.github/workflows/release-java.yml b/.github/workflows/release-java.yml
index bbabb535..ab36ec64 100644
--- a/.github/workflows/release-java.yml
+++ b/.github/workflows/release-java.yml
@@ -6,6 +6,8 @@ on:
         description: 'Release version (e.g., 0.1.0)'
         required: true
 
+permissions: read-all
+
 jobs:
   release:
     runs-on: ubuntu-latest