Description
File Browser versions from 2.50.0 through 2.63.21 fail to validate JWT expiration when proxy authentication is configured with a non-default logout page. Attackers with a previously valid token can access protected routes and administrative endpoints indefinitely, and exchange expired tokens for fresh ones via the renewal endpoint.
Metrics
CVSS 3.1 6.8/10
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:NWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| filebrowser | filebrowser | >= 2.50.0, <= 2.63.21 |
References
- https://github.com/filebrowser/filebrowser/commit/72faf6dd3c85628e332d3e567124b86708ce2695
- https://github.com/filebrowser/filebrowser/security/advisories/GHSA-v3jv-rmh2-635j
- https://www.vulncheck.com/advisories/file-browser-through-jwt-expiration-bypass
- https://github.com/filebrowser/filebrowser/security/advisories/GHSA-v3jv-rmh2-635j
Timeline
- Published
- Aug 13, 2026
- Last modified
- Sep 30, 2026
- NVD status
- Deferred