ci: pin GitHub Actions to commit SHAs#5449
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bschimke95 merged 1 commit intomasterfrom Apr 8, 2026
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All GitHub Action SHAs verified against their claimed version tags. Changes are correct and consistent.
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Summary
Pin all GitHub Actions to full commit SHAs for supply-chain security hardening, replacing mutable tag references.
Why
Mutable tags (e.g.
@v4) can be moved by upstream maintainers or by an attacker who compromises an action repo. Pinning to a SHA ensures workflows always run exactly the reviewed code.This follows GitHub's own security hardening guidance and improves our OpenSSF Scorecard rating.\n\n## Changes\n\n- Pinned all third-party and GitHub-maintained actions in workflow files to full 40-character commit SHAs\n- Preserved original tag versions in inline comments for readability\n- Left already-pinned actions unchanged\n\n## Testing\n\n- Verified all
uses:references in.github/workflows/now use immutable SHAs