CVE-2026-116682
FileBrowser Quantum: Symlink following escapes user scope allowing arbitrary file read outside the served directory
- State
- Published
- Severity
- 8.6 High
- Published
- Oct 27, 2026
- Updated
- Oct 27, 2026
- Reserved
- Oct 26, 2026
Description
FileBrowser Quantum is a free, self-hosted, web-based file manager. Prior to 1.5.2-stable and 2.0.1-beta, file read handling in backend/pkg/indexing/indexingFiles.go resolves symbolic links through GetRealPath without confirming that the resolved target remains inside the source root and the user's authorized scope. Download, preview, media, OnlyOffice, and public-share read flows that enable FollowSymlinks can therefore serve an out-of-scope target through a reachable in-scope symlink. An authenticated user with download access can read server-accessible files outside the assigned scope, and a holder of a public share link can do the same without an account when the shared directory exposes such a symlink. This issue is fixed in 1.5.2-stable and 2.0.1-beta.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 8.6 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N | GitHub_M |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
filebrowsergtsteffaniak |
|
References
- https://github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-mgqf-5mf5-prfj
- https://github.com/gtsteffaniak/filebrowser/pull/2795
- https://github.com/gtsteffaniak/filebrowser/pull/2800
- https://github.com/gtsteffaniak/filebrowser/commit/3c8c02414eefd3351ffe437fa39ff6eb150ffa67
- https://github.com/gtsteffaniak/filebrowser/commit/4126edeb07a015c3809a89249b283e07a4e50c38
- https://github.com/gtsteffaniak/filebrowser/releases/tag/v1.5.2-stable
- https://github.com/gtsteffaniak/filebrowser/releases/tag/v2.0.1-beta
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