CVE-2026-54685

MEDIUM

FileBrowser Quantum has Username Enumeration via Authentication Timing Side-Channel

Title source: cna
STIX 2.1

Description

FileBrowser Quantum is a free, self-hosted, web-based file manager. Prior to version 1.3.2-beta, the `/api/auth/login` authentication endpoint does not execute in constant time. When a non-existent username is supplied, the server returns a `401`/`403` response almost immediately. When a valid username is provided, the server performs a bcrypt password comparison, causing a measurable delay in the response time. Version 1.3.2-beta patches the issue.

References (3)

Core 3

Scores

CVSS v3 5.3
EPSS 0.0027
EPSS Percentile 19.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact partial

Details

CWE
CWE-208
Status published
Products (1)
gtsteffaniak/filebrowser < 1.3.2-beta
Published Jul 20, 2026
Tracked Since Jul 20, 2026