Improper Certificate Validation Affecting gnutls-guile package, versions *


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.03% (10th percentile)

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  • Snyk IDSNYK-RHEL6-GNUTLSGUILE-16895639
  • published27 May 2026
  • disclosed29 Apr 2026

Introduced: 29 Apr 2026

CVE-2026-42012  (opens in a new tab)
CWE-295  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:6 gnutls-guile.

NVD Description

Note: Versions mentioned in the description apply only to the upstream gnutls-guile package and not the gnutls-guile package as distributed by RHEL. See How to fix? for RHEL:6 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1