CVE-2026-72835

Medium

Description

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.

SeverityMedium

CVSS6.8

Exploit probability—

ProductFilebrowser

PublishedAug 14, 2026

First seenAug 14, 2026

Weakness typeCWE-41CWE-41

How to fix

Update

filebrowser filebrowser2.63.21 or later

Vendor advisories

github.com/filebrowser/filebrowser/security/advisories/GHSA-fgm5-pw99-w2p7

Affected products

Product	Affected versions	Fixed in
filebrowser filebrowser	v < 2.63.21	2.63.21

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