Advisory Details

March 9th, 2026

Unraid Authentication Request Path Traversal Authentication Bypass Vulnerability

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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