Vulnerability in Red Hat Discovery 2

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…

Vulnerability class: Improper Certificate Validation

EPSS: 0.004 (34.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-42013?
CVE-2026-42013 is a high-severity vulnerability in Red Hat Discovery 2, classified under Improper Certificate Validation. CVSS score: 8.2/10. Published 2026-05-26.
How severe is CVE-2026-42013?
High severity. CVSS v3 base score is 8.2 out of 10.