Improper Certificate Validation The advisory has been revoked - it doesn't affect any version of package rhcos (opens in a new tab)

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Snyk IDSNYK-RHEL9-RHCOS-16893883
published27 May 2026
disclosed29 Apr 2026

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Introduced: 29 Apr 2026

CVE-2026-42013 (opens in a new tab) CWE-295 (opens in a new tab)

Amendment

The Red Hat security team deemed this advisory irrelevant for RHEL:9.

NVD Description

Note: Versions mentioned in the description apply only to the upstream rhcos package and not the rhcos package as distributed by RHEL.

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.