Unraid Authentication Request Path Traversal Authentication Bypass Vulnerability

March 9th, 2026
ZDI-26-172 ZDI-CAN-28912

CVE ID

CVE-2026-3839

CVSS Score

7.3 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Affected Vendors

Unraid

Affected Products

Unraid

Vulnerability Details

This vulnerability allows remote attackers to bypass authentication on affected installations of Unraid. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the auth-request.php file. The issue results from the lack of proper validation of a user-supplied path prior to using it in authentications. An attacker can leverage this vulnerability to bypass authentication on the system.

Additional Details

Fixed in version 7.2.4.


Disclosure Timeline

  • 2026-02-17 - Vulnerability reported to vendor
  • 2026-03-09 - Coordinated public release of advisory
  • 2026-03-09 - Advisory Updated

Credit

Nicolas Chatelain (Nicocha30)

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