CVE-2026-42013
HIGH EPSS 30.7%
Published May 26, 20261mo ago · Modified Jun 17, 20261w ago
8.2 CVSS 3.1
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
Exploitability
Impact
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
- access.redhat.com https://access.redhat.com/errata/RHSA-2026:20611
- access.redhat.com https://access.redhat.com/errata/RHSA-2026:20612
- access.redhat.com https://access.redhat.com/errata/RHSA-2026:20613
- access.redhat.com https://access.redhat.com/errata/RHSA-2026:26319
- access.redhat.com https://access.redhat.com/errata/RHSA-2026:26409
- access.redhat.com https://access.redhat.com/security/cve/CVE-2026-42013
- bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2467448
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.