CVE-2026-72834: Filebrowser

Medium severity, CVSS 4.3. EPSS: 0.4% chance of exploitation in the next 30 days.

filebrowser before 2.63.19 contains a permission bypass in the /api/resources endpoint. The checksum (?checksum=) branch of resourceGetHandler reads the entire file to compute a digest and returns it without performing a Perm.Download check (unlike the sibling raw, preview, and subtitle paths). As a result, an authenticated user provisioned with Perm.Download=false can obtain a content-hash oracle for any same-scope file (md5/sha1/sha256/sha512), enabling confirmation of known/guessed content, change detection, and offline brute-force of low-entropy files. This is an incomplete fix of CVE-2026-35606; it bypasses only the Download permission and does not defeat scope/path authorization.

Affected products

• Filebrowser Filebrowser: before 2.63.19 (fixed in 2.63.19)

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