{"id":"CVE-2026-54685","aliases":["GHSA-7789-65hx-f26w","GO-2026-4820"],"url":"https://o3.security/vulnerability/CVE-2026-54685","summary":"FileBrowser Quantum has Username Enumeration via Authentication Timing Side-Channel","details":"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.","published":"2026-07-20T14:17:13.083Z","modified":"2026-08-12T03:51:48.801427243Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/gtsteffaniak/filebrowser/backend","fixedVersion":"0.0.0-20260317230626-af08800667b8"}],"fix":{"url":"https://github.com/gtsteffaniak/filebrowser/commit/af08800667b874620edc6f44c3e2e64fec7abd85","label":"gtsteffaniak/filebrowser@af08800"},"references":[{"type":"WEB","url":"https://github.com/gtsteffaniak/filebrowser/releases/tag/v1.3.2-beta"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54685.json"},{"type":"ADVISORY","url":"https://github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-7789-65hx-f26w"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54685"},{"type":"FIX","url":"https://github.com/gtsteffaniak/filebrowser/commit/af08800667b874620edc6f44c3e2e64fec7abd85"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:48.801427243Z"}}