CVE-2026-34964Adminer before 5.5.0 SSRF via PDO DSN Injection

Description

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.

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

References and patches

• GitHub Security Advisory (GHSA-58cq-mgw2-38m5) vendor-advisory
• VulnCheck Advisory: Adminer before 5.5.0 SSRF via PDO DSN Injection third-party-advisory