No-op - Pinning github actions to commit SHAs#491
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alex-page
approved these changes
Apr 27, 2026
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Why?
By using
some-org/some-action@v3you are trusting a mutable tag. If the upstream repo is compromised, a force-pushedv3ships malicious code into your workflow on the next run — see tj-actions/changed-files (March 2025) for recent real-world cases that leaked secrets across thousands of downstream workflows.Pinning to a full 40-char SHA (
uses: tj-actions/changed-files@<sha> # v45.0.3) makes the reference immutable and helps to mitigate this type of supply chain attacks.cc @alex-page for review.