Security Digest · Critical advisory (no CVE assigned)
GHSA-hq85-5cpj-mr62: uv's bundled CA store trusts an emSign root whose intermediate CA keys are compromised
By default, uv verifies TLS connections against a vendored copy of the webpki-root-certs bundle.
CVSS 9.1 Critical GitHub-reviewed · critical
Should you act?
- Only if you depend on one of the packages below, directly or transitively, in a vulnerable version. Check your lockfile with
pip-audit (or: pip show <package>). - No CVE has been assigned, so it will not appear in CVE-based scanners that ignore GitHub advisories.
npm audit,pip-auditand Dependabot do read GitHub advisories.
Affected packages
| Ecosystem | Package | Vulnerable | First fixed |
|---|---|---|---|
| PyPI | uv | < 0.13.4 | 0.13.4 |
Details
By default, uv verifies TLS connections against a vendored copy of the webpki-root-certs bundle. Versions before 0.13.4 include the emSign ECC Root CA - G3 root. Eight eMudhra intermediate CA certificates that chain to that root have compromised private keys, and the CA has revoked them.
An attacker with one of the compromised keys can issue certificates that uv accepts for any hostname, and can be used to issue certificates to enable MITM attacks.
uv 0.13.4 removes the root from its vendored bundle, following webpki-root-certs 1.0.10. Upgrade to 0.13.4 or later.
CVSS: 9.1 (v4.0) CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Sources and references
- GitHub Advisory GHSA-hq85-5cpj-mr62 github.com
- github.com github.com
- github.com github.com
- emudhra.we-have-a-problem.com emudhra.we-have-a-problem.com
- groups.google.com groups.google.com