CVE-2019-19522: OpenBSD

High severity, CVSS 7.8. EPSS: 0.5% chance of exploitation in the next 30 days.

OpenBSD 6.6, in a non-default configuration where S/Key or YubiKey authentication is enabled, allows local users to become root by leveraging membership in the auth group. This occurs because root's file can be written to /etc/skey or /var/db/yubikey, and need not be owned by root.

Affected products

• OpenBSD OpenBSD: version 6.6 only

Published 2019-12-05. Last modified 2026-06-17.