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CVE-2026-42011

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

CVSS 3.1 7.4 HIGHCheck source for fixed versionsKEV status unknown
Original advisory

cve-program · CVE-2026-42011

Published

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.

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Affected versions, risk and source history

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Publishers link these advisories through the identifiers shown below. A shared identifier or date alone does not tell you whether your software is affected or whether the advisories describe the same cause.

CVE-2026-42011 · CVE overview and exploitation status

cve-program · CVE-2026-42011

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