Vulnerability 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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gtsteffaniak | Filebrowser Quantum | < 1.3.1 |
Related Weaknesses (CWE)
References
- https://github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-fwj3-42wh-8ExploitVendor Advisory
- https://github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-fwj3-42wh-8ExploitVendor Advisory
FAQ
What is CVE-2026-44542?
CVE-2026-44542 is a vulnerability with a CVSS score of 9.1 (CRITICAL). 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, allow...
How severe is CVE-2026-44542?
CVE-2026-44542 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-44542?
Check the references section above for vendor advisories and patch information. Affected products include: Gtsteffaniak Filebrowser Quantum.