CVE-2026-54685: medium-severity vulnerability in gtsteffaniak filebrowser
FileBrowser Quantum has Username Enumeration via Authentication Timing Side-Channel
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.3epss 0.3%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Affected products
gtsteffaniak · filebrowserRelated CVEs — gtsteffaniak filebrowser
In the same product, most dangerous first.
CVE-2026-30933HIGHFileBrowser Quantum Incomplete Remediation of CVE-2026-27611: Password-Protected Share Bypass via /public/api/share/infoEPSS 0.6%CVE-2026-48777CRITICALFileBrowser Quantum: Path Traversal in public share PATCH allows file ops outside shared directoryEPSS 0.5%CVE-2026-116682HIGHFileBrowser Quantum: Symlink following escapes user scope allowing arbitrary file read outside the served directoryEPSS 0.5%CVE-2026-44542CRITICALFileBrowser Quantum: Unauthenticated Path Traversal in Public Share Delete Allows Arbitrary File DeletionEPSS 0.5%CVE-2026-46410HIGHFileBrowser Quantum: unauthenticated user share share infoEPSS 0.4%CVE-2026-54910HIGHFileBrowser Quantum's path traversal issue in subtitle handler allows any authenticated user to read arbitrary filesEPSS 0.4%