No published models are known to use this package.
cvss
9.0
critical
severity band, no base score published
epss
not scored
chance of exploitation in 30 days
xyz score
5.5
medium
CyberXYZ composite out of 10
fig. 01 — GHSA-6q48-6c7w-9gw2, the advisory selected below
// 4 advisories
GHSA-6q48-6c7w-9gw2
CRITICALGitHub rating
Certifi versions before 2026.10.18 include the emSign ECC Root CA - G3 root certificate in their bundled CA store. Eight eMudhra intermediate CA certificates that chain to this root have compromised private keys and the CA has revoked them.
An attacker with one of the compromised keys can issue valid-looking certificates for any hostname. If the attacker is also on-path, they can intercept or modify TLS traffic from clients that trust the certifi bundle. Examples include requests, urllib3 and pip, and the Python.org macOS installer.
Certifi 2026.10.18 removed all emSign roots from the bundle. Certifi 2026.10.19 restored the emSign roots that are not affected. Upgrade to 2026.10.19 or later, and rebuild container images that vendor certifi.
Checked 2026-11-06 at 21:35 UTC. The most recent advisory here was published 2026-10-20. Updated continuously from NVD, GHSA, OSV and CNA feeds.