What the fork? Imposter commits in GitHub Actions and CI/CD
GitHub Actions vulnerability allows forked commits to bypass workflow security settings.
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- 2026-10-10
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Unpinnable Actions: How Malicious Code Can Sneak into Your GitHub Actions Workflows paloaltonetworks.com
GitHub Actions, even when pinned to a commit SHA, can still pull in malicious code via mutable dependencies like Docker images, unlocked packages, or external scripts.
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The GitHub Actions Worm: Compromising GitHub Repositories Through the Actions Dependency Tree paloaltonetworks.com
A novel GitHub Actions worm exploits the action dependency tree. Attackers compromise an action, then infect dependent actions via branch pushes or tag overwrites, spreading malware recursively.
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Bypassing required reviews using GitHub Actions medium.com
GitHub Actions can bypass required reviews, allowing malicious code pushes to protected branches.
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Keeping your GitHub Actions and workflows secure Part 2: Untrusted input securitylab.github.com
GitHub Actions command injection.
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Keeping your GitHub Actions and workflows secure Part 1: Preventing pwn requests securitylab.github.com
Combining pull_request_target workflow trigger with an explicit checkout of an untrusted PR may lead to repository compromise.
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CI/CD Attacks › Techniques > Initial Code Execution: “GitHub Actions vulnerability allows forked commits to bypass workflow security settings.”