CVE-2026-72839

CRITICAL 9.8

filebrowser through 2.63.16 Privilege Escalation via Signup

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-266
Vendor	filebrowser
Product	filebrowser
Published	Aug 13, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

filebrowser / filebrowser

0 ≤ 2.63.16

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/filebrowser/filebrowser/security/advisories/GHSA-6759-996p-gpj6 vulncheck.com: https://www.vulncheck.com/advisories/filebrowser-through-privilege-escalation-via-signup

Credits

🔍 je-lv