Package vulnerability, severity critical

pypa/gh-action-pypi-publish: pypi-publish action revocation of CA in the chain that Sigstore uses in Trusted Publishing and Digital Attestations for PyPI

Published October 30, 2026, updated October 31, 2026

pypi-publish action revocation of CA in the chain that Sigstore uses in Trusted Publishing and Digital Attestations for PyPI. Source: GHSA-5xjx-3w67-w9x9.

What's affected

• pypa/gh-action-pypi-publish (GitHub Action)<1.14.3

What to do

1. Upgrade pypa/gh-action-pypi-publish to 1.14.3 or later.

Check whether you were affected

Pharon tells teams automatically when this affects something they run. To check a machine, run this in Claude Code with the Pharon plugin, in the repository that uses it:

/pharon:check-incident ghsa-5xjx-3w67-w9x9

References

• https://osv.dev/vulnerability/GHSA-5xjx-3w67-w9x9
• https://github.com/pypa/gh-action-pypi-publish/security/advisories/GHSA-5xjx-3w67-w9x9
• https://github.com/pypa/gh-action-pypi-publish

Notice ghsa-5xjx-3w67-w9x9, signed with key feed-prod-2026-10 (Ed25519). The Pharon CLI verifies the signature before using a notice.