CVE-2026-116682 FileBrowser Quantum: Symlink following escapes user scope allowing arbitrary file read outside the served directory
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-116682?
CVE-2026-116682 is a high-severity vulnerability in gtsteffaniak filebrowser, published on 27 Oct 2026.
Official 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.
Which versions are affected by CVE-2026-116682?
2 open source packages ship an affected version, including github.com/gtsteffaniak/filebrowser/backend.
| Package | Affected | Fixed in |
|---|---|---|
github.com/gtsteffaniak/filebrowser/backend Go | All versions | 0.0.0-20260814233832-4126edeb07a0 |
github.com/gtsteffaniak/filebrowser/backend Go | All versions | 0.0.0-20260814233832-4126edeb07a0 |
How do I fix CVE-2026-116682?
Upgrade github.com/gtsteffaniak/filebrowser/backend to 0.0.0-20260814233832-4126edeb07a0 or later.
Is CVE-2026-116682 being exploited?
There is no known exploitation of CVE-2026-116682 in the wild and no public exploit code.
Sources
Also known as GHSA-mgqf-5mf5-prfj.