CVE-2026-42012
HIGH EPSS 24.3%
Published May 26, 20261mo ago · Modified Jun 17, 20261w ago
7.1 CVSS 3.1
Published May 26, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago
Description
A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted certificate that contains Uniform Resource Identifier (URI) or Service (SRV) Subject Alternative Names (SANs). This could cause the certificate validation process to incorrectly fall back to checking DNS hostnames against the Common Name (CN), potentially allowing the attacker to spoof legitimate services or intercept sensitive information.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality Low
Integrity High
Availability None
Threat Intelligence
EPSS Exploit Probability
24.3% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-295
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-2026-42012
- bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2467441
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.