diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 0645eaf..1b515a3 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -9,3 +9,11 @@ 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 - see
+      # nexia-list#101/#104). Hold until upstream clears 4.38.1 or a
+      # newer release verifies green; revisit deliberately.
+      - dependency-name: "github/codeql-action"
+
diff --git a/.github/workflows/cflite_batch.yml b/.github/workflows/cflite_batch.yml
index f913a69..a7e050f 100644
--- a/.github/workflows/cflite_batch.yml
+++ b/.github/workflows/cflite_batch.yml
@@ -31,7 +31,7 @@ jobs:
           sanitizer: ${{ matrix.sanitizer }}
           mode: batch
           output-sarif: 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)
         # ClusterFuzzLite only emits vulnerabilities.sarif when there are
         # findings; uploading unconditionally failed clean runs with
         # "Path does not exist".
diff --git a/.github/workflows/cflite_pr.yml b/.github/workflows/cflite_pr.yml
index a532079..47a9161 100644
--- a/.github/workflows/cflite_pr.yml
+++ b/.github/workflows/cflite_pr.yml
@@ -32,7 +32,7 @@ jobs:
           sanitizer: ${{ matrix.sanitizer }}
           mode: code-change
           output-sarif: 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)
         # ClusterFuzzLite only emits vulnerabilities.sarif when there are
         # findings; uploading unconditionally failed clean runs with
         # "Path does not exist".
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 249f0cb..4a76866 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -40,11 +40,11 @@ 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 }}"