action-pinning-overview

To secure your CI/CD supply chain, pin GitHub Actions to explicit SHA-256 commits in your workflow steps, replacing mutable tag references to prevent tampered updates and silent changes. This requires human review for all action updates.

Pinning GitHub Actions to SHAs eliminates reliance on mutable tags, ensuring workflows run against fixed, verifiable commits. This prevents tampered updates and silent changes that could compromise your CI/CD supply chain security.

Yes, you can integrate Dependabot to manage SHA-pinned GitHub Actions. Dependabot proposes updates to your pinned SHAs, which then require human review before being merged into your secured CI workflows.

SHA pinning for GitHub Actions applies across both private and public repositories. It secures production CI pipelines by enforcing explicit SHA pins and review processes for all workflow steps regardless of repository visibility.

The best way to handle SHA pinning is to apply explicit SHA-256 pins to both internal and external GitHub Actions. This ensures comprehensive supply chain security by verifying all action commits during CI execution.

SHA pinning for GitHub Actions requires continuous maintenance through human review and Dependabot updates. If your team lacks the bandwidth to review constant SHA update proposals, this approach may bottleneck your CI pipeline updates.