CVE-2026-34964

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.

CVSS v3 5.8 MEDIUM

5.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/vrana/adminer/security/advisories/GHSA-58cq-mgw2-38m5
https://www.vulncheck.com/advisories/adminer-before-ssrf-via-pdo-dsn-injection

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-25 02:16

Updated : 2026-09-08 20:23

NVD link : CVE-2026-34964

Mitre link : CVE-2026-34964

CVE.ORG link : CVE-2026-34964

JSON object : View

Products Affected

No product.

CWE

CWE-918

Server-Side Request Forgery (SSRF)

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