Path Traversal in Unraid
CVE-2026-3839
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.
Vulnerability class: Path Traversal (Directory Traversal)
EPSS: 0.007 (47.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Unraid — versions 7.2.3
Weakness classification (CWE)
References
- zdi-disclosures@trendmicro.com (x_research-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2026-3839?
- CVE-2026-3839 is a high-severity vulnerability in Unraid, classified under Path Traversal. CVSS score: 7.3/10. Published 2026-03-16.
- How severe is CVE-2026-3839?
- High severity. CVSS v3 base score is 7.3 out of 10.