CVE-2026-35386: OpenBSD OpenSSH

High severity, CVSS 8.1. EPSS: 0.4% chance of exploitation in the next 30 days.

In OpenSSH before 10.3, command execution can occur via shell metacharacters in a username within a command line. This requires a scenario where the username on the command line is untrusted, and also requires a non-default configurations of % in ssh_config.

Affected products

• OpenBSD OpenSSH: from 10.0, before 10.3 (fixed in 10.3)

Published 2026-04-02. Last modified 2026-07-24.