CVE-2026-42013

HIGH EPSS 30.7%
Published May 26, 20261mo ago · Modified Jun 17, 20261w ago
8.2 CVSS 3.1
High
Find Similar
Published May 26, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago

Description

A flaw was found in gnutls. When validating certificates, an oversized Subject Alternative Name (SAN) could cause the validation process to incorrectly fall back to checking the Common Name (CN) field. This could allow a remote attacker to bypass proper certificate validation, potentially leading to spoofing or man-in-the-middle attacks.

CVSS Details

Base Score
8.2
Exploitability
3.9
Impact
4.2
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity High
Availability None

Threat Intelligence

EPSS Exploit Probability
30.7% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-1284

References 7

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.