VULNERABILITY INTELLIGENCE
CVE-2026-42013
CVSS score8.2 HIGH
EPSS probability0.42%
CISA KEVNot currently listed
Published2026-05-26
Last modified2026-10-30
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
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.
Weakness classification
- CWE-295: Improper Certificate Validation