Critical severity · published Aug 13, 2026
CVE-2026-72839
filebrowser through 2.63.16 Privilege Escalation via Signup
9.8
CVSS
0.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 47% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
filebrowser · filebrowser
through 2.63.16 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-72839
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-72839
github.com
https://github.com/filebrowser/filebrowser/security/advisories/GHSA-6759-996p-gpj6
www.vulncheck.com
https://www.vulncheck.com/advisories/filebrowser-through-privilege-escalation-via-signup
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