Pin third-party actions to SHA and harden workflows - #37
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April 17, 2026 08:34
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Summary
Pin all third-party GitHub Actions to full-length commit SHAs and update them to the latest stable versions. Add
persist-credentials: falseto checkout steps that don't require git credentials. Add.ghalint.yamlto exclude the tagpr job which needs credentials for pushing.Background
Unpinned actions using only version tags (e.g.
@v3,@v5) are vulnerable to supply chain attacks — a compromised tag can silently point to malicious code. SHA pinning ensures that the exact reviewed commit is used. Additionally,persist-credentials: falseprevents unintended use of the GITHUB_TOKEN after checkout, reducing the blast radius if a subsequent step is compromised.Changes
pinact -uwith 7-day cooldown):actions/checkout: v3/v4 →v6.0.2(SHA pinned)actions/labeler: v5 →v6.0.1(SHA pinned)Songmu/tagpr: v1.5.0 →v1.18.1(SHA pinned; v1.18.2/v1.18.3 skipped due to cooldown)EndBug/label-sync: v2 →v2.3.3(SHA pinned)persist-credentials: falseadded toadd_labels.yamlandsync_labels.yaml.ghalint.yamlcreated to excluderelease.yaml's tagpr job from the persist-credentials policy (tagpr needs credentials to push tags)