What is CVE-2026-67693?

CVE-2026-67693 is a high-severity vulnerability in N/a, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 7.5/10. Published 2026-10-08.

How severe is CVE-2026-67693?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in N/a

CVE-2026-67693

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)

Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)

Published 2026-10-08 · last modified 2026-10-09.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Weakness classification (CWE)

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

References

Frequently asked questions

What is CVE-2026-67693?: CVE-2026-67693 is a high-severity vulnerability in N/a, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 7.5/10. Published 2026-10-08.
How severe is CVE-2026-67693?: High severity. CVSS v3 base score is 7.5 out of 10.