ci: pin GitHub Actions to full commit SHAs in claude.yml#362
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Summary
Pins all GitHub Actions to full immutable commit SHAs instead of mutable version tags.
Vulnerability
Mutable tags (
@v1,@v3,@v4, etc.) can be silently updated — a compromised action repository could deliver malicious code into CI with access to secrets and write permissions. This is the same attack class as the tj-actions/changed-files supply chain incident (March 2025).Change
All
uses: action@vXreferences replaced withuses: action@<full-sha> # vX. No behaviour change — pins point to the exact same code as the current tags.References
Actions pinned
actions/checkoutv434e1148anthropics/claude-code-actionv1a92e7c7