CVE-2026-109786

In fail2ban 0.10.5 through 1.1.1 before ddd879d, the sshd filter config/filter.d/sshd.conf accepts an "on " suffix after the host address. Because OpenSSH logs the offered username verbatim, a remote unauthenticated attacker can use a username such as "x VICTIM-SOURCE-IP-ADDRESS on" to make...