CVE-2026-67693

State: Published
Severity: 3.7 Low
Published: Oct 8, 2026
Updated: Oct 19, 2026
Reserved: Jul 30, 2026

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)

Scores

CVSS	Score	Vector	Source
3.1	3.7 Low	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N	CISA-ADP

Weaknesses

CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition

Affected Products

Product	Versions
n/an/a	n/aAffected

References

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

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