CVE-2026-42013
HIGH
NVD
CVSS Score
8.2
Severity
HIGH
Published
May 26, 2026
Vendor
unknown
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.