Vulnerability · Published Aug 14, 2026 · Assigned by VulnCheck
CVE-2026-72837File Browser before 2.63.20 Privilege Escalation via Proxy Authentication
High 8.8
In plain English
A high-severity improper access control in filebrowser from filebrowser. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.6%top 53.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
File Browser versions before 2.63.20 fail to honor the createUserDir isolation in proxy and hook authentication auto-provisioning paths. Attackers with valid upstream-authenticated credentials can read, modify, delete, and share files belonging to other users by exploiting the server root scope assignment.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| filebrowser | filebrowser | 0 – before 2.63.20 |
Weakness: CWE-284 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- GitHub Security Advisory (GHSA-j7jh-37pf-mf8h) vendor-advisory
- VulnCheck Advisory: File Browser before 2.63.20 Privilege Escalation via Proxy Authentication third-party-advisory