CVE-2026-34964: Vrana Adminer

Medium severity, CVSS 5.8. EPSS: 0.4% chance of exploitation in the next 30 days.

Adminer before 5.5.0 contains a server-side request forgery vulnerability in the login form's server field validator, which only inspects leading integers for privileged ports and fails to reject non-numeric port values. Attackers can inject PDO DSN keys like host= and port= into the server parameter to bypass the privileged-port restriction and establish TCP connections to arbitrary internal hosts and ports before authentication.

Affected products

• Vrana Adminer: before 5.5.0 (fixed in 5.5.0)

Published 2026-08-25. Last modified 2026-09-08.