critical9.1
CVE-2026-44542
FileBrowser Public Share DELETE API Path Traversal Allows Unauthenticated Arbitrary File Deletion
Impact
FileBrowser Quantum is a free, self-hosted, web-based file manager. Prior to 1.3.1-stable and 1.3.9-beta, attacker-controlled path input is joined with a trusted base path prior to sanitization, allowing traversal sequences (e.g., ../) to escape the intended shared directory. As a result, an unauthenticated attacker possessing a valid public share hash with delete permissions enabled can delete arbitrary files outside the shared directory within the share owner’s configured storage scope. This affects public/api/resources and public/api/resources/bulk. This vulnerability is fixed in 1.3.1-stable and 1.3.9-beta.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/gtsteffaniak/filebrowser | < 0.0.0-20260501183844-112740bdd41d | 0.0.0-20260501183844-112740bdd41d |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Gtsteffaniak | Filebrowser Quantum | before 1.3.1 before 1.3.9 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-fwj3-42wh-8673
- https://github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-fwj3-42wh-8673
- https://github.com/gtsteffaniak/filebrowser/commit/112740bdd41de7d5eb01e13ba49d406bfc463f69
- https://nvd.nist.gov/vuln/detail/CVE-2026-44542