Unraid Update Request Path Traversal Remote Code Execution Vulnerability

March 9th, 2026
ZDI-26-171 ZDI-CAN-28951

CVE ID

CVE-2026-3838

CVSS Score

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

Affected Vendors

Unraid

Affected Products

Unraid

Vulnerability Details

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.

Additional Details

Fixed in version 7.2.4.


Disclosure Timeline

  • 2026-02-19 - 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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