CVE-2026-3838 Unraid Update Request Path Traversal Remote Code Execution Vulnerability

High 8.8 Published 13 Mar 2026 Updated 16 Mar 2026

Authenticated attackers can exploit path traversal in update.php to execute arbitrary code with root privileges on Unraid systems.

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

What is CVE-2026-3838?

CVE-2026-3838 is a high-severity path traversal vulnerability in Unraid, published on 13 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Unraid Update Request Path Traversal Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Unraid. Authentication is required to exploit this vulnerability.

The specific flaw exists within the update.php file. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-28951.

Weakness: CWE-22

Which versions are affected by CVE-2026-3838?

It affects 1 product.

Products include Unraid Unraid.

How do I fix CVE-2026-3838?

No fix has been published for CVE-2026-3838 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-2026-3838 being exploited?

There is no known exploitation of CVE-2026-3838 in the wild and no public exploit code.

Sources

Also known as GHSA-fx8c-7359-vxr3.