Vulnerability Description
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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/filebrowser/filebrowser/commit/b7dc392838f11d188f0bc0f2a1a99f
- https://github.com/filebrowser/filebrowser/security/advisories/GHSA-7whw-q6gh-xr
- https://www.vulncheck.com/advisories/filebrowser-before-permission-bypass-via-ch
FAQ
What is CVE-2026-72834?
CVE-2026-72834 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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 ...
How severe is CVE-2026-72834?
CVE-2026-72834 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-72834?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.