Privilege escalation in Filebrowser
CVE-2026-72839
filebrowser through 2.63.16 fails to properly restrict scope and permissions when self-signup is enabled with default CreateUserDir setting. Unauthenticated attackers can register accounts that inherit the server root scope with full create, modify, delete, rename, share, and download permissions, allowing unrestricted access to all files.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Filebrowser — versions 0
Weakness classification (CWE)
References
- disclosure@vulncheck.com (vendor-advisory)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-72839?
- CVE-2026-72839 is a critical-severity vulnerability in Filebrowser, classified under Incorrect Privilege Assignment. CVSS score: 9.8/10. Published 2026-08-13.
- How severe is CVE-2026-72839?
- Critical severity. CVSS v3 base score is 9.8 out of 10.