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VULNERABILITIES

CVE-2026-42011 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.4 HIGHVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://access.redhat.com/errata/RHSA-2026:13274 [email protected]
https://access.redhat.com/errata/RHSA-2026:20611 [email protected]
https://access.redhat.com/errata/RHSA-2026:20612 [email protected]
https://access.redhat.com/errata/RHSA-2026:20613 [email protected]
https://access.redhat.com/errata/RHSA-2026:26319 [email protected]

see all 23 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-295Improper Certificate Validation[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

28 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-42011
NVD Published Date:
May 7, 2026
NVD Last Modified:
Sep 3, 2026
Source:
[email protected]
CVE-2026-42011 Details - Not Deferred