CVE-2026-67693 Information disclosure in n/a
An attacker can obtain sensitive information by exploiting a failure to reject contradictory X.509 certificate key usages in GnuTLS.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-67693?
CVE-2026-67693 is a low-severity vulnerability in n/a, published on 8 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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)
Weakness: CWE-367
Which versions are affected by CVE-2026-67693?
How do I fix CVE-2026-67693?
Upgrade to a fixed version.
Is CVE-2026-67693 being exploited?
There is no known exploitation of CVE-2026-67693 in the wild and no public exploit code.
Sources
Also known as AZL-107448, DEBIAN-CVE-2026-67693, ECHO-a34c-1d60-970c, GHSA-j75v-5pm7-3cg8, ROOT-OS-DEBIAN-12-CVE-2026-67693, ROOT-OS-DEBIAN-13-CVE-2026-67693 and 1 more.