diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 2e3de96..9949fdf 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -12,3 +12,10 @@ updates:
       actions:
         patterns:
           - "*"
+    ignore:
+      # HOLD: github/codeql-action at v4.38.0 (SHA-pinned). v4.38.1 fails
+      # GitHub workflow-startup validation estate-wide (nexia-list#100;
+      # SHA-form re-bump bypassed versions-scoped ignores - nexia-list#101).
+      # Hold until upstream clears 4.38.1 or a new release verifies green.
+      - dependency-name: "github/codeql-action"
+
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index b995897..163646f 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -44,11 +44,11 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v7.0.1
       - name: Initialize CodeQL
-        uses: github/codeql-action/init@v4.38.1
+        uses: github/codeql-action/init@b96794f015dfd88f77b49b1c93e0fa7110f94c63 # v4.38.0 (4.38.1 blocked estate-wide; nexia-list#100)
         with:
           languages: ${{ matrix.language }}
           build-mode: ${{ matrix.build-mode }}
       - name: Perform CodeQL Analysis
-        uses: github/codeql-action/analyze@v4.38.1
+        uses: github/codeql-action/analyze@b96794f015dfd88f77b49b1c93e0fa7110f94c63 # v4.38.0 (4.38.1 blocked estate-wide; nexia-list#100)
         with:
           category: "/language:${{ matrix.language }}"
diff --git a/.github/workflows/hypatia-scan.yml b/.github/workflows/hypatia-scan.yml
index f536f40..b338d1c 100644
--- a/.github/workflows/hypatia-scan.yml
+++ b/.github/workflows/hypatia-scan.yml
@@ -235,7 +235,7 @@ jobs:
           always() && (github.event_name != 'pull_request' ||
 
            github.event.pull_request.head.repo.fork != true)
-        uses: github/codeql-action/upload-sarif@v4.38.1
+        uses: github/codeql-action/upload-sarif@b96794f015dfd88f77b49b1c93e0fa7110f94c63 # v4.38.0 (4.38.1 blocked estate-wide; nexia-list#100)
         with:
           sarif_file: hypatia.sarif
           # Distinct category so Hypatia results coexist with CodeQL's