Auth bypass in Filebrowser
CVE-2026-35604
File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to 2.63.1, when an admin revokes a user's Share and Download permissions, existing share links created by that user remain fully accessible to unauthenticated users. The public share download handler does not re-check the share owner's current permissions. This vulnerability is fixed in 2.63.1.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.004 (34.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 34.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
- Filebrowser — versions < 2.63.1
Weakness classification (CWE)
References
- github.com/filebrowser/filebrowser/security/advisories/GHSA-v9w4-gm2x-6rvf (Exploit, Vendor Advisory)
- github.com/filebrowser/filebrowser/pull/5888 (Patch)
Frequently asked questions
- What is CVE-2026-35604?
- CVE-2026-35604 is a high-severity vulnerability in Filebrowser, classified under Incorrect Authorization. CVSS score: 8.1/10. Published 2026-04-07.
- How severe is CVE-2026-35604?
- High severity. CVSS v3 base score is 8.1 out of 10.