Input validation error in FileBrowser - CVE-2026-72838
Published: July 27, 2026 / Updated: September 14, 2026
Vulnerability identifier: #VU139759
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-72838
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to improper input validation in the TUS resumable-upload endpoint and tusPatchHandler when handling PATCH requests for uploads. A remote user can send an oversized PATCH request body that exceeds the declared upload length to cause a denial of service.
The issue affects uploads where the server writes request data before enforcing the remaining expected length for the upload.
Affected software
FileBrowser
How to mitigate CVE-2026-72838
Install security update from vendor's website.
FileBrowser - update to 2.63.19