diff --git a/.github/workflows/pr-code-security.yml b/.github/workflows/pr-code-security.yml
index fde10666..3448776a 100644
--- a/.github/workflows/pr-code-security.yml
+++ b/.github/workflows/pr-code-security.yml
@@ -4,13 +4,34 @@ on:
   pull_request:
     branches: [main]
 
+permissions:
+  contents: read
+
 jobs:
   secret-detection:
     name: Secret Detection
-    if: github.event_name == 'pull_request'
-    uses: prisma/.github/.github/workflows/secret_detection.yml@main
-    secrets: inherit
-  code-scanning:
-    name: Code Scanning
-    if: github.event_name == 'pull_request'
-    uses: prisma/.github/.github/workflows/code_scanning.yml@main
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          # Full history so gitleaks can scan every commit in the PR range.
+          fetch-depth: 0
+          persist-credentials: false
+      # We run the gitleaks CLI directly rather than gitleaks-action: the
+      # action wrapper requires a paid license for repos under a GitHub
+      # organization, while the gitleaks binary itself is MIT-licensed and
+      # free. Pinned by version and verified by SHA-256 before use.
+      - name: Install gitleaks
+        env:
+          GITLEAKS_VERSION: 8.30.1
+          GITLEAKS_SHA256: 551f6fc83ea457d62a0d98237cbad105af8d557003051f41f3e7ca7b3f2470eb
+        run: |
+          set -euo pipefail
+          url="https://github.com/gitleaks/gitleaks/releases/download/v${GITLEAKS_VERSION}/gitleaks_${GITLEAKS_VERSION}_linux_x64.tar.gz"
+          curl -sSfL "$url" -o gitleaks.tar.gz
+          echo "${GITLEAKS_SHA256}  gitleaks.tar.gz" | sha256sum -c -
+          tar -xzf gitleaks.tar.gz gitleaks
+          sudo install gitleaks /usr/local/bin/gitleaks
+          gitleaks version
+      - name: Scan git history for secrets
+        run: gitleaks git --no-banner --redact --exit-code 1 --config .gitleaks.toml .
diff --git a/.gitleaks.toml b/.gitleaks.toml
new file mode 100644
index 00000000..3439483e
--- /dev/null
+++ b/.gitleaks.toml
@@ -0,0 +1,10 @@
+# gitleaks config for the PR secret scan: full default rule set, with the
+# self-signed TLS test fixtures under docker/certs/ allowlisted.
+[extend]
+useDefault = true
+
+[allowlist]
+description = "Self-signed TLS test fixtures for the local integration-test SQL Server container"
+paths = [
+    '''docker/certs/.*''',
+]