diff --git a/.github/workflows/bicep-build-to-validate.yml b/.github/workflows/bicep-build-to-validate.yml
index b7efff71f..f907c452a 100644
--- a/.github/workflows/bicep-build-to-validate.yml
+++ b/.github/workflows/bicep-build-to-validate.yml
@@ -17,8 +17,13 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
       - name: Checkout Repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
         with:
           fetch-depth: 0
 
@@ -114,15 +119,20 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
       - name: Checkout Repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
         with:
           fetch-depth: 0
 
       # Add pipeline tests for Azure Well-Architected Framework.
       # See https://aka.ms/ps-rule-action for configuration options.
       - name: Run PSRule analysis
-        uses: Microsoft/ps-rule@v2
+        uses: Microsoft/ps-rule@46451b8f5258c41beb5ae69ed7190ccbba84112c # v2.9.0
         with:
           modules: PSRule.Rules.Azure
           baseline: Azure.Preview
diff --git a/.github/workflows/code-review.yml b/.github/workflows/code-review.yml
index 5820ebd3d..8a1ed6706 100644
--- a/.github/workflows/code-review.yml
+++ b/.github/workflows/code-review.yml
@@ -7,20 +7,31 @@ on:
       - main
   workflow_dispatch: {}
 
+permissions:
+  contents: read
+
 jobs:
   lint:
+    permissions:
+      contents: read  # for actions/checkout to fetch code
+      statuses: write  # for github/super-linter to mark status of each linter run
     name: Lint code base
     runs-on: ubuntu-latest
 
     steps:
 
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
         with:
           fetch-depth: 0
 
       - name: Run github/super-linter
-        uses: github/super-linter@v7
+        uses: github/super-linter@b807e99ddd37e444d189cfd2c2ca1274d8ae8ef1 # v7
         env:
           # Lint all code - disabled in as part of #262
           VALIDATE_ALL_CODEBASE: false
@@ -42,13 +53,18 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
       - name: Checkout code
-        uses: actions/checkout@master
+        uses: actions/checkout@61b9e3751b92087fd0b06925ba6dd6314e06f089 # master
         with:
           fetch-depth: 0
 
       - name: Check links in markdown files
-        uses: gaurav-nelson/github-action-markdown-link-check@1.0.15
+        uses: gaurav-nelson/github-action-markdown-link-check@d53a906aa6b22b8979d33bc86170567e619495ec # 1.0.15
         with:
           config-file: ".github/actions-config/mlc_config.json"
           use-verbose-mode: "yes"
diff --git a/.github/workflows/dependency-review.yml b/.github/workflows/dependency-review.yml
new file mode 100644
index 000000000..7b0990bcf
--- /dev/null
+++ b/.github/workflows/dependency-review.yml
@@ -0,0 +1,27 @@
+# Dependency Review Action
+#
+# This Action will scan dependency manifest files that change as part of a Pull Request,
+# surfacing known-vulnerable versions of the packages declared or updated in the PR.
+# Once installed, if the workflow run is marked as required,
+# PRs introducing known-vulnerable packages will be blocked from merging.
+#
+# Source repository: https://github.com/actions/dependency-review-action
+name: 'Dependency Review'
+on: [pull_request]
+
+permissions:
+  contents: read
+
+jobs:
+  dependency-review:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
+      - name: 'Checkout Repository'
+        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
+      - name: 'Dependency Review'
+        uses: actions/dependency-review-action@5a2ce3f5b92ee19cbb1541a4984c76d921601d7c # v4.3.4
diff --git a/.github/workflows/gh-ado-sync.yml b/.github/workflows/gh-ado-sync.yml
index 16e3835b2..5ec1b6081 100644
--- a/.github/workflows/gh-ado-sync.yml
+++ b/.github/workflows/gh-ado-sync.yml
@@ -13,13 +13,18 @@ jobs:
     if: github.repository == 'Azure/ALZ-Bicep'
 
     steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
         with:
           fetch-depth: 0
 
       - name: GitHub/ADO Sync
-        uses: a11smiles/GitSync@v1.2.3
+        uses: a11smiles/GitSync@74d80b4ef67578135781e76ee1d4add1b98969b1 # v1.2.3
         env:
           ado_token: '${{ secrets.ADO_PERSONAL_ACCESS_TOKEN }}'
           config_file: './.github/actions-config/gh-ado-sync-config.json'
diff --git a/.github/workflows/pr-title-check.yml b/.github/workflows/pr-title-check.yml
index 8653fa4ef..612ab6317 100644
--- a/.github/workflows/pr-title-check.yml
+++ b/.github/workflows/pr-title-check.yml
@@ -7,11 +7,22 @@ on:
       - edited
       - synchronize
 
+permissions:
+  contents: read
+
 jobs:
   main:
+    permissions:
+      pull-requests: read  # for amannn/action-semantic-pull-request to analyze PRs
+      statuses: write  # for amannn/action-semantic-pull-request to mark status of analyzed PR
     name: Validate PR Title
     runs-on: ubuntu-latest
     steps:
-      - uses: amannn/action-semantic-pull-request@v5
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
+      - uses: amannn/action-semantic-pull-request@0723387faaf9b38adef4775cd42cfd5155ed6017 # v5.5.3
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/psdocs-mdtogit.yml b/.github/workflows/psdocs-mdtogit.yml
index 4c3519e1d..3d0000eec 100644
--- a/.github/workflows/psdocs-mdtogit.yml
+++ b/.github/workflows/psdocs-mdtogit.yml
@@ -26,8 +26,13 @@ jobs:
     name: Generate Markdown
     runs-on: ubuntu-latest
     steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
 
       - name: Show env
         run: env | sort
diff --git a/.github/workflows/release-tests.yml b/.github/workflows/release-tests.yml
index 5060990b9..acaea5c96 100644
--- a/.github/workflows/release-tests.yml
+++ b/.github/workflows/release-tests.yml
@@ -12,16 +12,21 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
       - name: Checkout Repo
         id: checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
         with:
           fetch-depth: 0
 
       - name: Pester Tests
         id: pester
         if: startsWith(github.head_ref, 'release')
-        uses: azure/powershell@v2
+        uses: azure/powershell@53dd145408794f7e80f97cfcca04155c85234709 # v2.0.0
         with:
           inlineScript: |
             Import-Module Pester -Force
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 4ba8bd9fc..70834503b 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -16,7 +16,12 @@ jobs:
     name: Generate Accelerator Release Artifacts
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - name: Harden Runner
+      uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+      with:
+        egress-policy: audit
+
+    - uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
 
     - name: Zip and Tar
       run: |
@@ -28,7 +33,7 @@ jobs:
         zip -r ../accelerator.zip .
 
     - name: Upload Artifacts to Action
-      uses: actions/upload-artifact@v4.4.0
+      uses: actions/upload-artifact@50769540e7f4bd5e21e526ee35c689e35e0d6874 # v4.4.0
       with:
         name: accelerator
         path: |
@@ -36,7 +41,7 @@ jobs:
           accelerator.zip
 
     - name: Add Artifacts to Release
-      uses: softprops/action-gh-release@v2
+      uses: softprops/action-gh-release@c062e08bd532815e2082a85e87e3ef29c3e6d191 # v2.0.8
       if: startsWith(github.ref, 'refs/tags/')
       with:
         files: |
diff --git a/.github/workflows/scheduled-bicep-build.yml b/.github/workflows/scheduled-bicep-build.yml
index 0c6140f82..526da82d4 100644
--- a/.github/workflows/scheduled-bicep-build.yml
+++ b/.github/workflows/scheduled-bicep-build.yml
@@ -16,8 +16,13 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
       - name: Checkout Repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
         with:
           fetch-depth: 0
 
diff --git a/.github/workflows/scorecard.yml b/.github/workflows/scorecard.yml
index c2eee6cee..f6c2a5987 100644
--- a/.github/workflows/scorecard.yml
+++ b/.github/workflows/scorecard.yml
@@ -31,6 +31,11 @@ jobs:
       # actions: read
 
     steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
       - name: "Checkout code"
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
         with:
diff --git a/.github/workflows/update-policy-china.yml b/.github/workflows/update-policy-china.yml
index f9a7cc30c..516801df3 100644
--- a/.github/workflows/update-policy-china.yml
+++ b/.github/workflows/update-policy-china.yml
@@ -13,6 +13,9 @@ env:
   pr_title: "feat: Update Policy Library for Azure China (automated)"
   pr_body: "This is an automated 'pull_request' containing updates to the library templates stored in '/infra-as-code/bicep/modules/policy/definitions/lib/china' & '/infra-as-code/bicep/modules/policy/assignments/lib'.\nPlease review the 'files changed' tab to review changes."
 
+permissions:
+  contents: read
+
 jobs:
   update-templates:
     name: Update Policy Library
@@ -22,20 +25,25 @@ jobs:
       contents: write
       pull-requests: write
     steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
       - name: Local repository checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
         with:
           path: ${{ github.repository }}
           fetch-depth: 0
 
       - name: Remote repository checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
         with:
           repository: ${{ env.remote_repository }}
           path: ${{ env.remote_repository }}
           ref: main
 
-      - uses: tibdex/github-app-token@v2
+      - uses: tibdex/github-app-token@3beb63f4bd073e61482598c45c71c1019b59b73a # v2.1.0
         id: generate-token
         with:
           app_id: ${{ secrets.APP_ID }}
@@ -65,7 +73,7 @@ jobs:
           GITHUB_TOKEN: ${{ steps.generate-token.outputs.token }}
 
       - name: Update Policy Library
-        uses: azure/powershell@v2
+        uses: azure/powershell@53dd145408794f7e80f97cfcca04155c85234709 # v2.0.0
         with:
           inlineScript: |
             Write-Information "==> Running script..." -InformationAction Continue
@@ -82,7 +90,7 @@ jobs:
           Install-Module -Name 'ALZ' -Force
 
       - name: Update Policy Definition Bicep Input Files
-        uses: azure/powershell@v2
+        uses: azure/powershell@53dd145408794f7e80f97cfcca04155c85234709 # v2.0.0
         with:
           inlineScript: |
             cd ${{ github.workspace }}/${{ github.repository }}
diff --git a/.github/workflows/update-policy.yml b/.github/workflows/update-policy.yml
index 369a44085..6eb1da2b8 100644
--- a/.github/workflows/update-policy.yml
+++ b/.github/workflows/update-policy.yml
@@ -13,6 +13,9 @@ env:
   pr_title: "feat: Update Policy Library (automated)"
   pr_body: "This is an automated 'pull_request' containing updates to the library templates stored in '/infra-as-code/bicep/modules/policy/definitions/lib' & '/infra-as-code/bicep/modules/policy/assignments/lib'.\nPlease review the 'files changed' tab to review changes."
 
+permissions:
+  contents: read
+
 jobs:
   update-templates:
     name: Update Policy Library
@@ -22,20 +25,25 @@ jobs:
       contents: write
       pull-requests: write
     steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
       - name: Local repository checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
         with:
           path: ${{ github.repository }}
           fetch-depth: 0
 
       - name: Remote repository checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
         with:
           repository: ${{ env.remote_repository }}
           path: ${{ env.remote_repository }}
           ref: main
 
-      - uses: tibdex/github-app-token@v2
+      - uses: tibdex/github-app-token@3beb63f4bd073e61482598c45c71c1019b59b73a # v2.1.0
         id: generate-token
         with:
           app_id: ${{ secrets.APP_ID }}
@@ -65,7 +73,7 @@ jobs:
           GITHUB_TOKEN: ${{ steps.generate-token.outputs.token }}
 
       - name: Update Policy Library
-        uses: azure/powershell@v2
+        uses: azure/powershell@53dd145408794f7e80f97cfcca04155c85234709 # v2.0.0
         with:
           inlineScript: |
             Write-Information "==> Running script..." -InformationAction Continue
@@ -82,7 +90,7 @@ jobs:
           Install-Module -Name 'ALZ' -Force
 
       - name: Update Policy Definition Bicep Input Files
-        uses: azure/powershell@v2
+        uses: azure/powershell@53dd145408794f7e80f97cfcca04155c85234709 # v2.0.0
         with:
           inlineScript: |
             cd ${{ github.workspace }}/${{ github.repository }}
diff --git a/.github/workflows/wiki-sync.yml b/.github/workflows/wiki-sync.yml
index 816cdc6a8..b1dcfe639 100644
--- a/.github/workflows/wiki-sync.yml
+++ b/.github/workflows/wiki-sync.yml
@@ -15,6 +15,9 @@ env:
   github_email: "41898282+github-actions[bot]@users.noreply.github.com"
   github_commit_message: "Wiki Sync from docs/wiki"
 
+permissions:
+  contents: read
+
 jobs:
   sync-wiki:
     name: Sync docs/wiki to Wiki
@@ -24,14 +27,19 @@ jobs:
       contents: write
       pull-requests: write
     steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
+        with:
+          egress-policy: audit
+
       - name: Checkout Source Repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
         with:
           repository: ${{ env.wiki_source_repo }}
           path: ${{ env.wiki_source_repo }}
 
       - name: Checkout Wiki Repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
         with:
           repository: ${{ env.wiki_target_repo }}
           path: ${{ env.wiki_target_repo }}