diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 0596948..d4fb12e 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -39,12 +39,12 @@ jobs:
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
 
       - name: Initialize CodeQL
-        uses: github/codeql-action/init@e4fba868fa4b1b91e1fdab776edc8cfbe6e9fb81 # v3
+        uses: github/codeql-action/init@ff2f1c621b7f889edc0d3c761ac2e6a3f8cdb0dd # v3
         with:
           languages: ${{ matrix.language }}
           build-mode: ${{ matrix.build-mode }}
 
       - name: Perform CodeQL Analysis
-        uses: github/codeql-action/analyze@e4fba868fa4b1b91e1fdab776edc8cfbe6e9fb81 # v3
+        uses: github/codeql-action/analyze@ff2f1c621b7f889edc0d3c761ac2e6a3f8cdb0dd # v3
         with:
           category: "/language:${{ matrix.language }}"
diff --git a/.github/workflows/hypatia-scan.yml b/.github/workflows/hypatia-scan.yml
index e2062f9..dde5313 100644
--- a/.github/workflows/hypatia-scan.yml
+++ b/.github/workflows/hypatia-scan.yml
@@ -242,7 +242,7 @@ jobs:
           always() &&
           (github.event_name != 'pull_request' ||
            github.event.pull_request.head.repo.fork != true)
-        uses: github/codeql-action/upload-sarif@e4fba868fa4b1b91e1fdab776edc8cfbe6e9fb81 # v3.28.1
+        uses: github/codeql-action/upload-sarif@ff2f1c621b7f889edc0d3c761ac2e6a3f8cdb0dd # v3.28.1
         with:
           sarif_file: hypatia.sarif
           # Distinct category so Hypatia results coexist with CodeQL's
diff --git a/.github/workflows/mirror.yml b/.github/workflows/mirror.yml
index eeabc9b..87af3d3 100644
--- a/.github/workflows/mirror.yml
+++ b/.github/workflows/mirror.yml
@@ -141,7 +141,7 @@ jobs:
           fetch-depth: 0
 
       - name: Setup Rust
-        uses: dtolnay/rust-toolchain@2c7215f132e9ebf062739d9130488b56d53c060c # stable
+        uses: dtolnay/rust-toolchain@6c977a6ca4077a0ceb28ffbe03f59d46e9ac8772 # stable
         with:
           toolchain: stable
 
diff --git a/.github/workflows/push-email-notify.yml b/.github/workflows/push-email-notify.yml
index 2a95f5d..f8f3fa4 100644
--- a/.github/workflows/push-email-notify.yml
+++ b/.github/workflows/push-email-notify.yml
@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Send push notification email
-        uses: dawidd6/action-send-mail@12335b969ae3fb71bee5f2c6b829744261aec34c # pinned
+        uses: dawidd6/action-send-mail@0bbdab096651ee93f37ec02383e088183d41ff0b # pinned
         with:
           server_address: ${{ secrets.SMTP_HOST }}
           server_port: ${{ secrets.SMTP_PORT }}
diff --git a/.github/workflows/secret-scanner.yml b/.github/workflows/secret-scanner.yml
index 139ac2c..58d8f2d 100644
--- a/.github/workflows/secret-scanner.yml
+++ b/.github/workflows/secret-scanner.yml
@@ -28,7 +28,7 @@ jobs:
           fetch-depth: 0  # Full history for scanning
 
       - name: TruffleHog Secret Scan
-        uses: trufflesecurity/trufflehog@6f3c981e7b77f235fd2702dd74af25fc4b72bf11 # v3
+        uses: trufflesecurity/trufflehog@bcfcf73aaf4759d4dadc2783177c245a02792318 # v3
         with:
           # The v3 action injects --fail automatically on pull_request events.
           # Passing --fail here triggers "flag 'fail' cannot be repeated".