Vulnerability · Published Aug 13, 2026 · Assigned by VulnCheck
CVE-2026-72839filebrowser through 2.63.16 Privilege Escalation via Signup
Critical 9.8
In plain English
A critical-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 0.6% (higher than 48% of all known vulnerabilities).
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.6%top 52.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
filebrowser through 2.63.16 fails to properly restrict scope and permissions when self-signup is enabled with default CreateUserDir setting. Unauthenticated attackers can register accounts that inherit the server root scope with full create, modify, delete, rename, share, and download permissions, allowing unrestricted access to all files.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| filebrowser | filebrowser | 0 – through 2.63.16 |
Weakness: CWE-266 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- GitHub Security Advisory (GHSA-6759-996p-gpj6) vendor-advisory
- VulnCheck Advisory: filebrowser through 2.63.16 Privilege Escalation via Signup third-party-advisory