ci: pin GitHub Actions to commit SHAs + add Dependabot#1
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allenfbyrd wants to merge 1 commit into
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Pin actions to immutable commit SHAs (with # vX comments) to defend against mutable-tag supply-chain attacks; add/extend a github-actions Dependabot config so the pins still receive reviewed update PRs.
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What
Pin all GitHub Actions in this repo to immutable commit SHAs (with
# vXcomments) and add/extend agithub-actionsDependabot config.Why
Tag refs like
@v4are mutable: a compromised or re-pointed tag silently changes what runs in CI (the top GitHub Actions supply-chain vector). Pinning to an immutable commit SHA removes that risk; Dependabot keeps the pins current via reviewed update PRs. Part of an org-wide move toward enablingsha_pinning_required.