SEPTEMBER 18, 2026
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Case File

CVE-2026-34959

MEDIUM · CVSS 4.7 EPSS 0.21% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-25 · Last synced 2026-09-18

CyberRota Analysis

AI-Generated

Adminer versions 4.6.0 to 5.5.0 are vulnerable due to improper handling of the X-Forwarded-Prefix header, allowing attackers to manipulate the $_SERVER["REQUEST_URI"] without validation. This can lead to an authenticated open redirect, unauthorized control over the session cookie path, and potential poisoning of self-referential links. Organizations using affected versions should prioritize patching to mitigate risks associated with session hijacking and redirect vulnerabilities.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-34959
Severity
MEDIUM
CVSS
4.7
EPSS
0.21%

Original NVD Description

Adminer 4.6.0 before 5.5.0 prepends the client-supplied X-Forwarded-Prefix header to $_SERVER["REQUEST_URI"] with no trusted-proxy check and no validation of the prefix value. An attacker can supply an absolute URL (e.g. X-Forwarded-Prefix: https://evil.example) that flows into Location redirect headers, the Set-Cookie path attribute, and self-referential links. This enables an authenticated open redirect after state-changing POSTs, unauthenticated control of the session cookie path attribute, and poisoning of self-referential links; CR/LF cannot be injected, so header splitting/XSS is not possible.