diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 3158a6e..54197cc 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -43,6 +43,15 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
+          # The release job declares `contents: write`, which overrides this repo's
+          # read-only default workflow permission -- so the checkout's default
+          # persisted credential is WRITE-scoped and stays live in .git/config
+          # through `npm ci` below. A compromised dependency lifecycle script
+          # could read it off disk and push. semantic-release authenticates its
+          # own pushes from GITHUB_TOKEN, so it does not need the persisted
+          # credential; `persist-credentials: false` is semantic-release's own
+          # documented GitHub Actions recipe. (CWE-250)
+          persist-credentials: false
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8d91fbe..ef58fac 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -24,6 +24,8 @@ Releases are cut automatically by semantic-release from conventional commits.
 
 ### Added
 
+- **Release workflow no longer persists a write-scoped git credential across `npm ci`.** The release job declares `contents: write`, which overrides this repo's read-only default workflow permission, so `actions/checkout`'s default persisted credential was write-scoped and lived in `.git/config` through dependency install, build and test — readable by any compromised dependency lifecycle script. `persist-credentials: false` is semantic-release's own documented GitHub Actions recipe; it authenticates its pushes from `GITHUB_TOKEN` directly and never needed the persisted credential. (CWE-250)
+
 - Initial SDK: `MailprotectorClient` with fifteen resource classes (`resellers`,
   `customers`, `domains`, `userGroups`, `users`, `managers`, `messages`,
   `allowBlockRules`, `configuration`, `logs`, `statements`, `emailRouting`,