{"id":"CVE-2026-54910","aliases":["GHSA-vvp7-h4fj-m28w","GO-2026-6164"],"url":"https://o3.security/vulnerability/CVE-2026-54910","summary":"FileBrowser Quantum's path traversal issue in subtitle handler allows any authenticated user to read arbitrary files","details":"FileBrowser Quantum is a free, self-hosted, web-based file manager. Prior to version 1.4.3-beta, the `subtitlesHandler` endpoint (`GET /api/media/subtitles`) accepts two user-controlled query parameters: `path` and `name`, both of which are used in filesystem operations without sanitization, creating two independent path traversal vectors. The primary vector is the `path` parameter: it is passed directly to `idx.GetRealPath()` without calling `SanitizeUserPath()`, allowing an attacker to escape the storage root and set `parentDir` to any directory on the host. No existing anchor file is required.  The secondary vector is the `name` parameter: it is joined with `parentDir` via `filepath.Join(parentDir, name)` without stripping directory components, allowing traversal relative to any resolved `parentDir`. Any authenticated user (regardless of role or permissions) can exploit either vector to read any text file readable by the server process, including `/etc/passwd`, SSH keys, database credentials, and JWT signing keys. Version 1.4.3-beta patches the issue.","published":"2026-07-20T14:20:21.412Z","modified":"2026-09-09T18:26:42.001579558Z","cvss":{"score":7.7,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N"},"epss":{"score":0.0046,"percentile":0.37882,"asOf":"2026-08-24"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/gtsteffaniak/filebrowser/backend","fixedVersion":"0.0.0-20260608182036-f3f4bbe80cb5"}],"fix":{"url":"https://github.com/gtsteffaniak/filebrowser/commit/f3f4bbe80cb569d664174aea874d7bfa008c3b5a","label":"gtsteffaniak/filebrowser@f3f4bbe"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54910.json"},{"type":"ADVISORY","url":"https://github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-vvp7-h4fj-m28w"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54910"},{"type":"FIX","url":"https://github.com/gtsteffaniak/filebrowser/commit/f3f4bbe80cb569d664174aea874d7bfa008c3b5a"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-09T18:26:42.001579558Z"}}