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VULNERABILITIES

CVE-2026-42012 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.1 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

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 18 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

24 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-42012
NVD Published Date:
May 26, 2026
NVD Last Modified:
Sep 1, 2026
Source:
[email protected]
CVE-2026-42012 Details - Not Deferred