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Popular GitHub Action Targeted in Supply Chain Attack

Posted: Mon Mar 17, 2025 10:14 am
by rbc
A popular GitHub Action has been compromised in a supply chain attack apparently targeting secrets associated with continuous integration and continuous delivery (CI/CD).

The targeted GitHub Action is called ‘tj-actions/changed-files’. Tj-actions provides GitHub Actions for streamlining CI/CD processes. Changed-files, which is actively used in over 23,000 repositories, is designed for tracking file and directory changes.

According to StepSecurity, a security company specializing in GitHub Actions, the incident started on March 14 and involved a threat actor modifying the Changed-files code to execute a malicious Python script designed to dump CI/CD secrets to build logs.
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Popular GitHub Action Targeted in Supply Chain Attack