CVE-2026-67693

Severity: low (CVSS 3.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-08 · updated 2026-10-19
Weakness: CWE-367

Description

An issue in gnutls v.3.8.13 allows an attacker to obtain sensitive information via failing to reject end-entity X.509 certificates that contain a contradictory combination of Key Usage (KU) and Extended Key Usage (EKU)

References

http://gnutls.com
https://gist.github.com/lkloliver/6fbfc191bc6163942c8017551ac3f238
https://gitlab.com/gnutls/gnutls/-/blob/3.8.13/lib/x509/verify.c#L1119-1178
https://gitlab.com/gnutls/gnutls/-/work_items/1642

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