CVE-2026-72835: Filebrowser

Medium severity, CVSS 6.8. EPSS: 0.5% chance of exploitation in the next 30 days.

filebrowser versions before v2.63.21 fail to canonicalize paths before evaluating access rules, allowing authenticated users to bypass administrator-defined deny rules using case-variant or backslash-separated paths. Attackers can request files with alternate path representations that match no rule but resolve to the same filesystem object, gaining unauthorized access to denied files within their scope.

Affected products

• Filebrowser Filebrowser: before 2.63.21 (fixed in 2.63.21)

Published 2026-08-14. Last modified 2026-09-08.