CVE-2026-54685

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.

• CWE-208

• https://github.com/gtsteffaniak/filebrowser/commit/af08800667b874620edc6f44c3e2e64fec7abd85
• https://github.com/gtsteffaniak/filebrowser/releases/tag/v1.3.2-beta
• https://github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-7789-65hx-f26w
• https://github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-7789-65hx-f26w

Published

Jul 20, 2026

Last Modified

Jul 22, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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