diff --git a/.github/workflows/sycl-aws.yml b/.github/workflows/sycl-aws.yml
index b149d21dc3548..b12fa65473d2c 100644
--- a/.github/workflows/sycl-aws.yml
+++ b/.github/workflows/sycl-aws.yml
@@ -1,5 +1,7 @@
 name: Start/Stop AWS instance
 
+permissions: read-all
+
 on:
   workflow_call:
     inputs:
diff --git a/.github/workflows/sycl-containers.yaml b/.github/workflows/sycl-containers.yaml
index bb2e086929847..ca41632349b06 100644
--- a/.github/workflows/sycl-containers.yaml
+++ b/.github/workflows/sycl-containers.yaml
@@ -21,6 +21,8 @@ on:
       - 'devops/scripts/install_build_tools.sh'
       - '.github/workflows/sycl-containers.yaml'
 
+permissions: read-all
+
 jobs:
   base_image_ubuntu2204:
     if: github.repository == 'intel/llvm'
diff --git a/.github/workflows/sycl-detect-changes.yml b/.github/workflows/sycl-detect-changes.yml
index c9059a519e095..02b85e044b4af 100644
--- a/.github/workflows/sycl-detect-changes.yml
+++ b/.github/workflows/sycl-detect-changes.yml
@@ -7,6 +7,8 @@ on:
         description: Matched filters
         value: ${{ jobs.need_check.outputs.filters }}
 
+permissions: read-all
+
 jobs:
   need_check:
     name: Decide which tests could be affected by the changes
diff --git a/.github/workflows/sycl-docs.yml b/.github/workflows/sycl-docs.yml
index 73062642535cf..aa55b36d129e5 100644
--- a/.github/workflows/sycl-docs.yml
+++ b/.github/workflows/sycl-docs.yml
@@ -11,8 +11,13 @@ on:
     - 'clang/docs/**'
     - 'sycl/doc/**'
 
+permissions:
+  contents: read
+
 jobs:
   build:
+    permissions:
+      contents: write  # for Git to git push
     runs-on: ubuntu-latest
     if: github.repository == 'intel/llvm'
     steps:
diff --git a/.github/workflows/sycl-linux-build.yml b/.github/workflows/sycl-linux-build.yml
index b9718b390bd99..3c100bd62ab5f 100644
--- a/.github/workflows/sycl-linux-build.yml
+++ b/.github/workflows/sycl-linux-build.yml
@@ -103,6 +103,9 @@ on:
         options:
           - 3
 
+permissions:
+  contents: read
+
 jobs:
   build:
     name: Build + LIT
diff --git a/.github/workflows/sycl-linux-matrix-e2e-on-nightly.yml b/.github/workflows/sycl-linux-matrix-e2e-on-nightly.yml
index 06a5f13674768..215ea98a0d913 100644
--- a/.github/workflows/sycl-linux-matrix-e2e-on-nightly.yml
+++ b/.github/workflows/sycl-linux-matrix-e2e-on-nightly.yml
@@ -10,6 +10,9 @@ on:
           Format: '{"VAR1":"VAL1","VAR2":"VAL2",...}'
         default: '{"LIT_FILTER":""}'
 
+permissions:
+  contents: read
+
 jobs:
   linux_e2e_on_nightly:
     name: E2E on Nightly
diff --git a/.github/workflows/sycl-linux-precommit-aws.yml b/.github/workflows/sycl-linux-precommit-aws.yml
index 8ff68e725e447..62a9b8516e8d0 100644
--- a/.github/workflows/sycl-linux-precommit-aws.yml
+++ b/.github/workflows/sycl-linux-precommit-aws.yml
@@ -14,6 +14,9 @@ on:
     types:
       - completed
 
+permissions:
+  contents: read
+
 jobs:
   create-check:
     runs-on: [Linux, build]
diff --git a/.github/workflows/sycl-linux-precommit.yml b/.github/workflows/sycl-linux-precommit.yml
index c509578eb116a..ff249a5ae73ce 100644
--- a/.github/workflows/sycl-linux-precommit.yml
+++ b/.github/workflows/sycl-linux-precommit.yml
@@ -29,6 +29,9 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
   cancel-in-progress: true
 
+permissions:
+  contents: read
+
 jobs:
   detect_changes:
     uses: ./.github/workflows/sycl-detect-changes.yml
diff --git a/.github/workflows/sycl-linux-run-tests.yml b/.github/workflows/sycl-linux-run-tests.yml
index bafcc23e07b2f..59f1ad983691e 100644
--- a/.github/workflows/sycl-linux-run-tests.yml
+++ b/.github/workflows/sycl-linux-run-tests.yml
@@ -132,6 +132,9 @@ on:
           - false
           - true
 
+permissions:
+  contents: read
+
 jobs:
   run:
     name: ${{ inputs.name }}
diff --git a/.github/workflows/sycl-macos-build-and-test.yml b/.github/workflows/sycl-macos-build-and-test.yml
index b79fbb3fa7ad5..cbed75afda944 100644
--- a/.github/workflows/sycl-macos-build-and-test.yml
+++ b/.github/workflows/sycl-macos-build-and-test.yml
@@ -19,6 +19,9 @@ on:
         required: false
         default: ""
 
+permissions:
+  contents: read
+
 jobs:
   build:
     name: Build
diff --git a/.github/workflows/sycl-nightly.yml b/.github/workflows/sycl-nightly.yml
index 1cbc65efa9773..4cabff7162cd7 100644
--- a/.github/workflows/sycl-nightly.yml
+++ b/.github/workflows/sycl-nightly.yml
@@ -5,6 +5,9 @@ on:
   schedule:
     - cron: '0 3 * * *'
 
+permissions:
+  contents: read
+
 jobs:
   ubuntu2204_build:
     if: github.repository == 'intel/llvm'
diff --git a/.github/workflows/sycl-post-commit.yml b/.github/workflows/sycl-post-commit.yml
index aaf36263a93a9..b63ccac9d49c1 100644
--- a/.github/workflows/sycl-post-commit.yml
+++ b/.github/workflows/sycl-post-commit.yml
@@ -19,6 +19,9 @@ on:
     - ./devops/actions/cleanup
     - ./devops/actions/cached_checkout
 
+permissions:
+  contents: read
+
 jobs:
   build-lin:
     name: Linux (Self build + shared libraries + no-assertions)
diff --git a/.github/workflows/sycl-stale-issues.yml b/.github/workflows/sycl-stale-issues.yml
index a362cf1faa803..8a468d0152f6c 100644
--- a/.github/workflows/sycl-stale-issues.yml
+++ b/.github/workflows/sycl-stale-issues.yml
@@ -4,8 +4,14 @@ on:
   schedule:
     - cron: '30 1 * * *'
 
+permissions:
+  contents: read
+
 jobs:
   close-issues:
+    permissions:
+      issues: write  # for actions/stale to close stale issues
+      pull-requests: write  # for actions/stale to close stale PRs
     runs-on: ubuntu-20.04
     steps:
     - uses: actions/stale@v9
diff --git a/.github/workflows/sycl-sync-main.yml b/.github/workflows/sycl-sync-main.yml
index 54d50acd9f80b..89192cb8eeee5 100644
--- a/.github/workflows/sycl-sync-main.yml
+++ b/.github/workflows/sycl-sync-main.yml
@@ -3,8 +3,13 @@ name: main branch sync
 on:
   workflow_dispatch:
 
+permissions:
+  contents: read
+
 jobs:
   sync:
+    permissions:
+      contents: write  # for Git to git push
     runs-on: ubuntu-20.04
     if: github.repository == 'intel/llvm'
     steps:
diff --git a/.github/workflows/sycl-update-gpu-driver.yml b/.github/workflows/sycl-update-gpu-driver.yml
index 9dcb66b7d95bd..aeea3aa7270a9 100644
--- a/.github/workflows/sycl-update-gpu-driver.yml
+++ b/.github/workflows/sycl-update-gpu-driver.yml
@@ -5,8 +5,13 @@ on:
     - cron:  '0 3 * * 2'
   workflow_dispatch:
 
+permissions:
+  contents: read
+
 jobs:
   update_driver_linux:
+    permissions:
+      contents: write  # for Git to git push
     runs-on: ubuntu-20.04
     if: github.repository == 'intel/llvm'
     steps:
diff --git a/.github/workflows/sycl-windows-build.yml b/.github/workflows/sycl-windows-build.yml
index 47014318c16de..b8e65af7b0f77 100644
--- a/.github/workflows/sycl-windows-build.yml
+++ b/.github/workflows/sycl-windows-build.yml
@@ -50,6 +50,8 @@ on:
         type: choice
         options:
           - 3
+permissions:
+  contents: read
 
 jobs:
   build:
diff --git a/.github/workflows/sycl-windows-run-tests.yml b/.github/workflows/sycl-windows-run-tests.yml
index f5a718c6cc9c1..cacd46462a8e7 100644
--- a/.github/workflows/sycl-windows-run-tests.yml
+++ b/.github/workflows/sycl-windows-run-tests.yml
@@ -32,6 +32,10 @@ on:
         type: string
         default: '{}'
         required: False
+
+permissions:
+  contents: read
+
 jobs:
   run:
     name: ${{ inputs.name }}