Vulnerability Description
File Browser provides a file managing interface within a specified directory and it can be used to upload, delete, preview, rename and edit files. Prior to 2.57.1, an authenticated user can bypass the application's "Disallow" file path rules by modifying the request URL. By adding multiple slashes (e.g., //private/) to the path, the authorization check fails to match the rule, while the underlying filesystem resolves the path correctly, granting unauthorized access to restricted files. This vulnerability is fixed in 2.57.1.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Filebrowser | Filebrowser | < 2.57.1 |
Related Weaknesses (CWE)
References
- https://github.com/filebrowser/filebrowser/commit/489af403a19057f6b6b4b1dc0e48cbPatch
- https://github.com/filebrowser/filebrowser/releases/tag/v2.57.1ProductRelease Notes
- https://github.com/filebrowser/filebrowser/security/advisories/GHSA-4mh3-h929-w9ExploitVendor Advisory
FAQ
What is CVE-2026-25890?
CVE-2026-25890 is a vulnerability with a CVSS score of 8.1 (HIGH). File Browser provides a file managing interface within a specified directory and it can be used to upload, delete, preview, rename and edit files. Prior to 2.57.1, an authenticated user can bypass the...
How severe is CVE-2026-25890?
CVE-2026-25890 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-25890?
Check the references section above for vendor advisories and patch information. Affected products include: Filebrowser Filebrowser.