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PyPI Blog: Token Exfiltration Campaign via GitHub Actions Workflows


Incident report of a recent attack campaign targeting GitHub Actions workflows to exfiltrate PyPI tokens, our response, and steps to protect your projects.

securitytransparency I recently responded to an attack campaign where malicious actors injected code into GitHub Actions workflows attempting to steal PyPI publishing tokens. Later on September 5th, another researcher from GitGuardian emailed PyPI Security directly about their current findings, effectively an expansion of the previous attack. After triaging the situation, I discovered another Indicator of Compromise (IoC) in the form of a URL, which I shared with GitGuardian to assist with their ongoing investigation.

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