Add zizmor checks on CI. (#5161)

* Add zizmor checks on CI.

* Fix zizmor credentials warnings

* Add persist-credentials: false to action-cached-lfs-checkout too.

* Add empty permissions by default.

* Ignore pull_request_target failure and add a warning.

.github/workflows/accessibility_tests.yml

@@ -5,7 +5,9 @@ on:
 
   schedule:
     - cron:  '0 2 * * 1-5'
-    
+
+permissions: {}
+
 jobs:
   tests:
     name: Tests
@@ -19,6 +21,8 @@ jobs:
 
     steps:
       - uses: nschloe/action-cached-lfs-checkout@f46300cd8952454b9f0a21a3d133d4bd5684cfc2 #v1.2.3
+        with:
+          persist-credentials: false
 
       - name: Setup environment
         run: source ci_scripts/ci_common.sh && setup_github_actions_environment
@@ -27,7 +31,7 @@ jobs:
         run: swift run -q tools ci accessibility-tests
 
       - name: Archive artifacts
-        uses: actions/upload-artifact@v7
+        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
         if: failure()
         with:
           name: Results

.github/workflows/automatic-calendar-version.yml

@@ -7,6 +7,8 @@ on:
     - cron: '0 3 * * 2'
   workflow_dispatch:
 
+permissions: {}
+
 # Bumps the year and month, resetting the patch.
 # Patch bumps are handled by the release script.
 jobs:
@@ -18,7 +20,9 @@ jobs:
     if: github.repository == 'element-hq/element-x-ios'
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
 
       - name: Setup environment
         run: 

.github/workflows/blocked.yml

@@ -1,7 +1,13 @@
 name: Prevent blocked
+
 on:
-  pull_request_target:
+  # Privilege escalation necessary to access PR context and set status checks
+  # 🚨 We must not execute any checked out code here, and be careful around use of user-controlled inputs.
+  pull_request_target: # zizmor: ignore[dangerous-triggers]
     types: [opened, labeled, unlabeled, synchronize]
+
+permissions: {}
+
 jobs:
   prevent-blocked:
     name: Prevent blocked
@@ -10,7 +16,7 @@ jobs:
       pull-requests: read
     steps:
       - name: Add notice
-        uses: actions/github-script@v8
+        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
         if: contains(github.event.pull_request.labels.*.name, 'X-Blocked')
         with:
           script: |

.github/workflows/compound-ios.yml

@@ -16,6 +16,8 @@ on:
     paths:
       - 'compound-ios/**'
 
+permissions: {}
+
 jobs:
   tests:
 
@@ -30,6 +32,8 @@ jobs:
 
     steps:
     - uses: nschloe/action-cached-lfs-checkout@f46300cd8952454b9f0a21a3d133d4bd5684cfc2 #v1.2.3
+      with:
+        persist-credentials: false
 
     - name: Configure Xcode 26
       run: sudo xcode-select -s /Applications/Xcode_26.1.1.app
@@ -54,7 +58,7 @@ jobs:
       run: zip -r Logs/CompoundTests.xcresult.zip Logs/CompoundTests.xcresult/
 
     - name: Archive artifacts
-      uses: actions/upload-artifact@v7
+      uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
       if: failure() # We only care about artefacts if the tests fail
       with:
         name: test-results

.github/workflows/danger.yml

@@ -4,6 +4,8 @@ on:
   pull_request:
     types: [ labeled, synchronize, opened, reopened ]
 
+permissions: {}
+
 jobs:
   build:
     name: Danger
@@ -16,7 +18,10 @@ jobs:
       cancel-in-progress: true
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
       - name: Danger
         uses: danger/swift@434d7c25f3b02d490a340b23f5e78dd15a5670bc # 3.22.1
         env:

.github/workflows/integration-tests.yml

@@ -6,6 +6,8 @@ on:
     
   workflow_dispatch:
 
+permissions: {}
+
 jobs:
   integration_tests:
     name: Integration Tests
@@ -18,7 +20,9 @@ jobs:
       cancel-in-progress: false
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
 
       - name: Setup environment
         run:
@@ -32,7 +36,7 @@ jobs:
           INTEGRATION_TESTS_PASSWORD: ${{ secrets.INTEGRATION_TESTS_PASSWORD }}
 
       - name: Archive artifacts
-        uses: actions/upload-artifact@v7
+        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
         # We only care about artefacts if the tests fail
         if: failure()
         with:

.github/workflows/post-release.yml

@@ -5,6 +5,8 @@ on:
     tags:
       - 'release/**'
 
+permissions: {}
+
 jobs:
   post-release:
     runs-on: ubuntu-latest
@@ -13,7 +15,7 @@ jobs:
 
     steps:
       - name: Trigger pipeline
-        uses: actions/github-script@v8
+        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
         with:
           github-token: ${{ secrets.ENTERPRISE_ACTIONS_TOKEN }}
           script: |

.github/workflows/stale-issues.yml

@@ -4,13 +4,15 @@ on:
   schedule:
     - cron: "30 1 * * *"
 
+permissions: {}
+
 jobs:
   stale:
     runs-on: ubuntu-latest
     permissions:
       issues: write
     steps:
-      - uses: actions/stale@v10
+      - uses: actions/stale@b5d41d4e1d5dceea10e7104786b73624c18a190f # v10.2.0
         with:
           only-labels: "X-Needs-Info"
           days-before-issue-stale: 30

.github/workflows/translations-pr.yml

@@ -5,6 +5,8 @@ on:
     - cron: '0 3 * * 1'
   workflow_dispatch:
 
+permissions: {}
+
 jobs:
   open-translations-pr:
     runs-on: macos-15
@@ -14,7 +16,9 @@ jobs:
     if: github.repository == 'element-hq/element-x-ios'
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
 
       - name: Setup environment
         run: 

.github/workflows/triage_incoming.yml

@@ -4,13 +4,15 @@ on:
   issues:
     types: [opened]
 
+permissions: {} # We use ELEMENT_BOT_TOKEN instead
+
 jobs:
   add_to_triage:
     runs-on: ubuntu-latest
     if: >
       github.repository == 'element-hq/element-x-ios'
     steps:
-        - uses: actions/add-to-project@main
+        - uses: actions/add-to-project@244f685bbc3b7adfa8466e08b698b5577571133e # v1.0.2
           with:
               project-url: https://github.com/orgs/element-hq/projects/81
               github-token: ${{ secrets.ELEMENT_BOT_TOKEN }}
@@ -22,7 +24,7 @@ jobs:
     if: >
       github.repository == 'element-hq/element-x-ios'
     steps:
-        - uses: actions/add-to-project@main
+        - uses: actions/add-to-project@244f685bbc3b7adfa8466e08b698b5577571133e # v1.0.2
           with:
               project-url: https://github.com/orgs/element-hq/projects/43
               github-token: ${{ secrets.ELEMENT_BOT_TOKEN }}

.github/workflows/triage_labelled.yml

@@ -4,6 +4,8 @@ on:
   issues:
     types: [labeled]
 
+permissions: {} # We use ELEMENT_BOT_TOKEN instead
+
 jobs:
   ex_plorers:
     name: Add labelled issues to X-Plorer project
@@ -11,7 +13,7 @@ jobs:
     if: >
       contains(github.event.issue.labels.*.name, 'Team: Element X Feature')
     steps:
-      - uses: actions/add-to-project@main
+      - uses: actions/add-to-project@244f685bbc3b7adfa8466e08b698b5577571133e # v1.0.2
         with:
           project-url: https://github.com/orgs/element-hq/projects/73
           github-token: ${{ secrets.ELEMENT_BOT_TOKEN }}
@@ -22,7 +24,7 @@ jobs:
     if: >
       contains(github.event.issue.labels.*.name, 'Team: Verticals Feature')
     steps:
-      - uses: actions/add-to-project@main
+      - uses: actions/add-to-project@244f685bbc3b7adfa8466e08b698b5577571133e # v1.0.2
         with:
           project-url: https://github.com/orgs/element-hq/projects/57
           github-token: ${{ secrets.ELEMENT_BOT_TOKEN }}
@@ -33,7 +35,7 @@ jobs:
     if: >
       contains(github.event.issue.labels.*.name, 'Team: Element X Platform')
     steps:
-      - uses: actions/add-to-project@main
+      - uses: actions/add-to-project@244f685bbc3b7adfa8466e08b698b5577571133e # v1.0.2
         with:
           project-url: https://github.com/orgs/element-hq/projects/43
           github-token: ${{ secrets.ELEMENT_BOT_TOKEN }}
@@ -45,7 +47,7 @@ jobs:
       contains(github.event.issue.labels.*.name, 'Team: QA') ||
       contains(github.event.issue.labels.*.name, 'X-Needs-Signoff')
     steps:
-      - uses: actions/add-to-project@main
+      - uses: actions/add-to-project@244f685bbc3b7adfa8466e08b698b5577571133e # v1.0.2
         with:
           project-url: https://github.com/orgs/element-hq/projects/69
           github-token: ${{ secrets.ELEMENT_BOT_TOKEN }}
@@ -56,7 +58,7 @@ jobs:
     if: >
       contains(github.event.issue.labels.*.name, 'X-Needs-Signoff')
     steps:
-      - uses: actions/add-to-project@main
+      - uses: actions/add-to-project@244f685bbc3b7adfa8466e08b698b5577571133e # v1.0.2
         with:
           project-url: https://github.com/orgs/element-hq/projects/89
           github-token: ${{ secrets.ELEMENT_BOT_TOKEN }}

.github/workflows/ui_tests.yml

@@ -10,6 +10,8 @@ on:
   schedule:
     - cron:  '0 2 * * 1-5'
 
+permissions: {}
+
 jobs:
   tests:
     name: Tests
@@ -27,6 +29,8 @@ jobs:
 
     steps:
       - uses: nschloe/action-cached-lfs-checkout@f46300cd8952454b9f0a21a3d133d4bd5684cfc2 #v1.2.3
+        with:
+          persist-credentials: false
 
       - name: Setup environment
         run: source ci_scripts/ci_common.sh && setup_github_actions_environment
@@ -34,13 +38,15 @@ jobs:
       - name: Run tests
         run: |
           args=(--device-type "${{ matrix.device }}")
-          if [[ -n "${{ github.event.inputs.test_name }}" ]]; then
+          if [[ -n "${GITHUB_EVENT_INPUTS_TEST_NAME}" ]]; then
-            args+=( --test-name "${{ github.event.inputs.test_name }}")
+            args+=( --test-name "${GITHUB_EVENT_INPUTS_TEST_NAME}")
           fi
           swift run -q tools ci ui-tests "${args[@]}"
+        env:
+          GITHUB_EVENT_INPUTS_TEST_NAME: ${{ github.event.inputs.test_name }}
 
       - name: Archive artifacts
-        uses: actions/upload-artifact@v7
+        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
         # We only care about artefacts if the tests fail
         if: failure()
         with:

.github/workflows/unit_tests.yml

@@ -8,6 +8,8 @@ on:
   
   pull_request:
 
+permissions: {}
+
 jobs:
   tests:
     name: Tests
@@ -21,6 +23,8 @@ jobs:
 
     steps:
       - uses: nschloe/action-cached-lfs-checkout@f46300cd8952454b9f0a21a3d133d4bd5684cfc2 #v1.2.3
+        with:
+          persist-credentials: false
 
       - name: Setup environment
         run: source ci_scripts/ci_common.sh && setup_github_actions_environment
@@ -29,7 +33,7 @@ jobs:
         run: swift run -q tools ci unit-tests
 
       - name: Archive artifacts
-        uses: actions/upload-artifact@v7
+        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
         # We only care about artefacts if the tests fail
         if: failure()
         with:

.github/workflows/unit_tests_enterprise.yml

@@ -8,6 +8,8 @@ on:
   
   pull_request:
 
+permissions: {}
+
 jobs:
   tests:
     name: Tests (Enterprise)
@@ -27,6 +29,7 @@ jobs:
         with:
           submodules: recursive
           token: ${{ secrets.ELEMENT_BOT_TOKEN }}
+          persist-credentials: false
 
       - name: Setup environment
         run: source ci_scripts/ci_common.sh && setup_github_actions_environment
@@ -38,7 +41,7 @@ jobs:
         run: swift run -q tools ci unit-tests --skip-previews
               
       - name: Archive artifacts
-        uses: actions/upload-artifact@v7
+        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
         # We only care about artefacts if the tests fail
         if: failure()
         with:

.github/workflows/zizmor.yml

@@ -0,0 +1,24 @@
+name: GitHub Actions Security Analysis with zizmor 🌈
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["**"]
+
+permissions: {}
+
+jobs:
+  zizmor:
+    name: Run zizmor 🌈
+    runs-on: ubuntu-latest
+    permissions:
+      security-events: write # Required for upload-sarif (used by zizmor-action) to upload SARIF files.
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - name: Run zizmor 🌈
+        uses: zizmorcore/zizmor-action@0dce2577a4760a2749d8cfb7a84b7d5585ebcb7d # v0.5.0