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Pin GitHub Actions to commit SHAs - #4
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Pin each action ref to the commit SHA of its current tag with pinact. The versions do not change. Add a monthly grouped Dependabot entry for github-actions to keep the SHAs current. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Do not set up automatic Dependabot updates for actions. Restore .github/dependabot.yml to its state before this branch. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
joemcbride
approved these changes
Oct 9, 2026
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Why
Git tags are mutable. A tag such as
@v4can move to different code at any time. In March 2025 an attacker moved the tags oftj-actions/changed-filesto a malicious commit. Every workflow that used a tag ran that code and leaked CI secrets. A full commit SHA cannot move.What changed
uses:reference now points to a 40-character commit SHA, with the version in a trailing comment (owner/repo@<sha> # vX.Y.Z). pinact made these edits from the GitHub API. Nobody typed a SHA by hand.v4gets the comment of the full release with the same SHA../...) and refs to branches are not changed.No other files changed.
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