Vulnerability · Published May 14, 2026 · Assigned by GitHub_M
CVE-2026-44542FileBrowser Quantum: Unauthenticated Path Traversal in Public Share Delete Allows Arbitrary File Deletion
Critical 9.1
In plain English
A critical-severity path traversal in filebrowser from gtsteffaniak. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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 & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/gtsteffaniak/filebrowser | 0.0.0-20260501183844-112740bdd41d | GHSA-fwj3-42wh-8673 |
| Go | github.com/gtsteffaniak/filebrowser | 0.0.0-20260501183844-112740bdd41d | GO-2026-5383 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| gtsteffaniak | filebrowser | < 1.3.1-stable< 1.3.9-beta |
Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H