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Vulnerabilities CVE-2026-42011

CVE-2026-42011

High
Open
TLP:CLEAR

Gnutls: gnutls: security bypass due to incorrect name constraint handling

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Description

A flaw was found in gnutls. This vulnerability occurs because permitted name constraints were incorrectly ignored when previous Certificate Authorities (CAs) only had excluded name constraints. A remote attacker could exploit this to bypass critical name constraint checks during certificate validation. This bypass could lead to the acceptance of invalid certificates, potentially enabling spoofing or man-in-the-middle attacks against affected systems.

Details

CVSS Score
7.4
EPSS Score
0.48%

39.1th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Confidence
90%
Published
May 7, 2026
Last Modified
Jul 13, 2026
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