CVE-2026-35414

A flaw was found in OpenSSH. This vulnerability arises from the incorrect handling of the authorized_keys principals option in uncommon scenarios. Specifically, when a principals list is used with a Certificate Authority that includes comma characters, OpenSSH may misinterpret the input. This could lead to security bypasses, potentially allowing unintended access or information disclosure in specific authentication contexts.

The risk posed by this flaw to Red Hat products is limited. The use of SSH certificates is not enabled by default and requires that users opt-in to the feature. Further, when following documented guidance ssh connections should only be permitted to non-root users which will limit the impact of this flaw.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.