Post by Harry Sintonen

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The fallout from the malicious tj-actions/changed-files is still being investigated. It is fortunate that this malicious commit was identified fairly quickly, as further compromise of major OSS components and projects could lead to a kind of chain reaction.

- https://www.stepsecurity.io/blog/harden-runner-detection-tj-actions-changed-files-action-is-compromised
- https://semgrep.dev/blog/2025/popular-github-action-tj-actionschanged-files-is-compromised/

#infosec #cybersecurity

Edited 1d ago

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@harrysintonen the second and third order impacts of this could get interesting

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@jerry It largely depends on how well the initial impact is cleaned up. I'm hoping we won't see a ton of backdoors in various components next.

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