Vulnerability · Published Aug 13, 2026 · Assigned by VulnCheck
CVE-2026-73611File Browser 2.50.0 through 2.63.21 JWT Expiration Bypass
Medium 6.8
In plain English
A medium-severity security flaw in filebrowser from filebrowser. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities).
Severity (CVSS 3.1)6.8Medium
Exploit odds (30 days)0.4%top 62.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| filebrowser | filebrowser | 2.50.0 – through 2.63.21 |
Weakness: CWE-613 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
References
- GitHub Security Advisory (GHSA-v3jv-rmh2-635j) vendor-advisory
- Patch Commit patch
- VulnCheck Advisory: File Browser 2.50.0 through 2.63.21 JWT Expiration Bypass third-party-advisory