What is CVE-2026-42012?

CVE-2026-42012 is a high-severity vulnerability in Red Hat Discovery 2, classified under Improper Certificate Validation. CVSS score: 7.1/10. Published 2026-05-26.

How severe is CVE-2026-42012?

High severity. CVSS v3 base score is 7.1 out of 10.

Vulnerability in Red Hat Discovery 2

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 caus…

Vulnerability class: Improper Certificate Validation

EPSS: 0.004 (27.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N.

Affected products

Red Hat Discovery 2 — versions 1782159791, 1782166952
Red Hat Enterprise Linux 10 — versions 0:3.8.10-4.el10_2
Red Hat Enterprise Linux 10.0 Extended Update Support — versions 0:3.8.9-9.el10_0.19
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8 — versions 0:3.6.16-8.el8_10.6
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support — versions 0:3.6.14-10.el8_4.1, 0:4.13-3.el8_4.1
Red Hat Enterprise Linux 8.4 Extended Update Support Long-life Add-on — versions 0:3.6.14-10.el8_4.1, 0:4.13-3.el8_4.1
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support — versions 0:3.6.16-5.el8_6.5, 0:4.13-3.el8_6.2
Red Hat Enterprise Linux 8.6 Extended Update Support Long-life Add-on — versions 0:3.6.16-5.el8_6.5, 0:4.13-3.el8_6.2

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

References

secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
secalert@redhat.com (x_refsource_REDHAT, issue-tracking)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
secalert@redhat.com
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)

Frequently asked questions

What is CVE-2026-42012?: CVE-2026-42012 is a high-severity vulnerability in Red Hat Discovery 2, classified under Improper Certificate Validation. CVSS score: 7.1/10. Published 2026-05-26.
How severe is CVE-2026-42012?: High severity. CVSS v3 base score is 7.1 out of 10.