uv's bundled CA store trusts an emSign root whose intermediate CA keys are compromised

Date Oct 20, 2026
Type Vendor advisory
Signal Critical vendor advisory
Vendor / Product PyPI · uv
Critical vendor advisory

Summary

uv's bundled CA store trusts an emSign root whose intermediate CA keys are compromised

Why it matters

GitHub has published a reviewed security advisory for uv. Prioritize it with other application dependency updates.

Operator check

Check whether uv is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available. CVSS score: 9.1.

Sources

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.