CVE-2026-59999: OpenBSD OpenSSH

High severity, CVSS 7.5. EPSS: 0.2% chance of exploitation in the next 30 days.

In sshd in OpenSSH before 10.4, DisableForwarding=yes was supposed to take precedence over PermitTunnel=yes, but did not.

Affected products

• OpenBSD OpenSSH: before 10.4 (fixed in 10.4)

Published 2026-07-08. Last modified 2026-07-09.