Detections
Analytics
CVE-2026-42013
high
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.
References
https://access.redhat.com/errata/RHSA-2026:60019
https://access.redhat.com/errata/RHSA-2026:59831
https://access.redhat.com/errata/RHSA-2026:58981
https://access.redhat.com/errata/RHSA-2026:57483
https://access.redhat.com/errata/RHSA-2026:56853
https://access.redhat.com/errata/RHSA-2026:43575
https://access.redhat.com/errata/RHSA-2026:41921
https://access.redhat.com/errata/RHSA-2026:40762
https://access.redhat.com/errata/RHSA-2026:33125
https://access.redhat.com/errata/RHSA-2026:32962
https://access.redhat.com/errata/RHSA-2026:30850
https://access.redhat.com/errata/RHSA-2026:30849
https://access.redhat.com/errata/RHSA-2026:30004
https://access.redhat.com/errata/RHSA-2026:29197
https://access.redhat.com/errata/RHSA-2026:26409
https://access.redhat.com/errata/RHSA-2026:26319
https://access.redhat.com/errata/RHSA-2026:20613
https://access.redhat.com/errata/RHSA-2026:20612