CVE-2026-42012

Published: Mag 27, 2026 Last Modified: Mag 27, 2026
ExploitDB:
Other exploit source:
Google Dorks:
HIGH 7,1
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: required
Scope: unchanged
Confidentiality: low
Integrity: high
Availability: none

Description

AI Translation Available

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.

295

Improper Certificate Validation

Draft
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Integrity Authentication
Potential Impacts:
Bypass Protection Mechanism Gain Privileges Or Assume Identity
Applicable Platforms
Technologies: Not Technology-Specific, Web Based, Mobile
View CWE Details
https://access.redhat.com/security/cve/CVE-2026-42012
https://access.redhat.com/security/cve/CVE-2026-42012
https://bugzilla.redhat.com/show_bug.cgi?id=2467441
https://bugzilla.redhat.com/show_bug.cgi?id=2467441