#VU121644 Information Exposure Through Timing Discrepancy in FileBrowser
Published: January 19, 2026
Vulnerability identifier: #VU121644
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/U:Green
CVE-ID: N/A
CWE-ID: CWE-208
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerable software:
FileBrowser
FileBrowser
Software vendor:
File Browser
File Browser
Description
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to the JSONAuth.Auth function contains a logic flaw. A remote attacker can can measure the response time of the /api/login endpoint and enumerate valid usernames.
Remediation
Install updates from vendor's website.