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CVE-2026-42012

Medium

Elevated severity or exploit probability.

CVSS base
7.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N
EPSS — probability of exploitation (30 days)
0.5%
39.3th percentile
CISA KEV
Not listed
Weakness / dates
CWE-295
Published 2026-05-26 · modified 2026-09-01

Description

A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted certificate that contains Uniform Resource Identifier (URI) or Service (SRV) Subject Alternative Names (SANs). This could cause the certificate validation process to incorrectly fall back to checking DNS hostnames against the Common Name (CN), potentially allowing the attacker to spoof legitimate services or intercept sensitive information.

References

Official: NVD · CVE.org