HIGH

CVE-2026-67693

gnutls: gnutls: Information disclosure via contradictory Key Usage and Extended Key Usage extensions

CVSS v3

7.5

HIGH

EPSS Score

—

exploit probability

CISA KEV

known exploited

Exploitation

—

SSVC status

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)

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published: 2026-10-08
Last Modified: 2026-10-09

Frequently asked questions

What is CVE-2026-67693?

Is CVE-2026-67693 actively exploited?

Active exploitation of CVE-2026-67693 has not been confirmed.

What is the CVSS score for CVE-2026-67693?

CVE-2026-67693 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Is CVE-2026-67693 affecting your environment?

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