CVE-2026-3839 Unraid Authentication Request Path Traversal Authentication Bypass Vulnerability

High 7.3 Published 13 Mar 2026 Updated 16 Mar 2026

Remote attackers can bypass authentication in Unraid OS via path traversal in auth-request.php without needing credentials.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-3839?

CVE-2026-3839 is a high-severity path traversal vulnerability in Unraid, published on 13 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Unraid Authentication Request Path Traversal Authentication Bypass Vulnerability. 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. Was ZDI-CAN-28912.

Weakness: CWE-22

Which versions are affected by CVE-2026-3839?

It affects 1 product.

Products include Unraid Unraid.

How do I fix CVE-2026-3839?

No fix has been published for CVE-2026-3839 yet. Limit exposure of the affected software until one is available.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2026-3839 being exploited?

There is no known exploitation of CVE-2026-3839 in the wild and no public exploit code.

Sources

Also known as GHSA-hv24-53jm-mrp5.