Is there a public exploit for CVE-2026-42012?

No public exploit for CVE-2026-42012 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-42012?

CVE-2026-42012 scores CVSS 7.1 (v3.1), rated high. EPSS puts the chance of exploitation in the next 30 days at 0.35%.

What does CVE-2026-42012 affect?

CVE-2026-42012 affects Red Hat Cert Manager support for Red Hat OpenShift release 1.18, Red Hat Discovery 2, Red Hat Enterprise Linux 8.8 Telecommunications Update Service, Red Hat Update Infrastructure 5, Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions, Cert Manager support for Red Hat OpenShift release 1.17.

7.1 High

A flaw was found in gnutls.

CVE-2026-42012

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.

Assessment

CVSS: 7.1 (v3.1)
Severity: High
EPSS: 0.35% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 26 May 2026
Last updated: 3 November 2026
Affected: Red Hat · Cert Manager support for Red Hat OpenShift release 1.17 · Cert Manager support for Red Hat OpenShift release 1.18 · Cert Manager support for Red Hat OpenShift release 1.20 · Red Hat Discovery 2
Assigner: redhat

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N

At the source

EUVD (ENISA)

References

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