CVE-2026-42013

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.

Score
CVSS 3.1 8.2 High
Status
Awaiting Analysis - secalert@redhat.com
Published
2026-05-26
Last modified
2026-10-14
Weaknesses
CWE-295

Affected products

References

 
 
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