CVE-2026-34964Medium· 5.8▾ Sunlit

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

▾ Sunlit zone — Low / medium · no exploitation signal

Depth score32/ 100 · Low

impact 31.9 · likelihood 0.1 · exploitation 0

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Proof of concept

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Published

Aug 25, 2026

Updated

Sep 8, 2026

CVSS

5.8

Vendor

—

Product

—

CWE

CWE-918

Depth score

32 · Low

EPSS

0.31% · p24

Platforms

—

Source

NVD

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

EPSS history

Exploit-prediction probability, daily snapshots since Sep 8.

0.3% → 0.3%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

3 events · 14 days

Aug 25, 2026Published
Disclosed via NVD
Sep 8, 2026Record revised
Last analysed / modified upstream
Sep 8, 2026EPSS first tracked
0.3%

CWE-918 #nvd

Full technical detail▾

Overview

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.

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd

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