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A GitHub-reviewed security advisory, not necessarily under active exploitation the way our CISA KEV advisories are, but a real, disclosed vulnerability in an open-source dependency.
Affected packages
Vulnerable: <= 1.14.2
Patched in 1.14.3
Details
The pypi-publish action versions before 1.14.2 used to bundle the emSign root CA trust store certificate through the certifi distribution. It has since been removed through the bundle and the new version no longer includes them.
The certifi-provided TLS trust store is typically used by many projects in the Python ecosystem, including Sigstore that pypi-publish relies on for Trusted Publishing and Digital Attestations.
The external compromise is being tracked at https://emudhra.we-have-a-problem.com
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A secure code review or supply chain review finds this before an advisory does.