Pin GitHub Actions to commit SHAs for supply chain security#700
Merged
laughingman7743 merged 2 commits intomasterfrom Mar 29, 2026
Merged
Pin GitHub Actions to commit SHAs for supply chain security#700laughingman7743 merged 2 commits intomasterfrom
laughingman7743 merged 2 commits intomasterfrom
Conversation
Pin all GitHub Actions in workflow files to full commit hashes using pinact, mitigating supply chain attacks via mutable tags. Also add a pinact CI workflow that automatically pins actions on PRs that modify workflow files, using a GitHub App for authentication. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Remove root action.yml/action.yaml filters (not a composite action repo) and add .github/actions/** for local composite actions. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
WHAT
pinact.yamlCI workflow that automatically pins actions on PRs modifying workflow filespyathena-bot) for authentication to enable auto-commit of pinned hashesWHY
Mutable version tags (e.g.,
@v4) are vulnerable to supply chain attacks — a compromised tag can silently replace the action code. Pinning to commit SHAs ensures immutable, auditable action references. Version comments (e.g.,# v4.3.1) are preserved for readability.