ci(security): harden CI/CD supply chain with SHA pinning and least-privilege permissions#650
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…ivilege permissions - Pin all GitHub Actions to full SHA with version comments - Add top-level permissions: contents: read to test.yml - Add top-level permissions: contents: read to release.yml (write only at job level) - Upgrade pypa/gh-action-pypi-publish from release/v1 tag to v1.14.0 SHA - Add pip ecosystem tracking to dependabot - Add commit-message prefixes and labels to dependabot config
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What changed
Action pinning
All GitHub Actions SHA-pinned to full 40-char commits with
# vX.Y.Zcomments, preventing tag-hijacking attacks:actions/checkout@v6@de0fac2...(v6)actions/setup-python@v6@a309ff8...(v6)pypa/gh-action-pypi-publish@release/v1@cef2210...(v1.14.0)peaceiris/actions-gh-pages@v4@4f9cc66...(v4)Least-privilege permissions
permissions: { contents: read }(previously defaulted to broad read/write).permissions: { contents: read }; write permissions granted only at thepublishjob level where needed.Dependabot
pipecosystem tracking (weekly).ci/chore) and labels for easier triage.open-pull-requests-limitto both ecosystems.Why
Supply-chain attacks on GitHub Actions (e.g., codecov, tj-actions) exploit mutable tags and overly broad tokens. SHA pinning + least privilege are the standard mitigations recommended by GitHub and OpenSSF.