CVE-2026-32758
File Browser has an Access Rule Bypass via Path Traversal in Copy/Rename Destination Parameter
File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Versions 2.61.2 and below are vulnerable to Path Traversal through the resourcePatchHandler (http/resource.go). The destination path in resourcePatchHandler is validated against access rules before being cleaned/normalized, while the actual file operation calls path.Clean() afterward—resolving .. sequences into a different effective path. This allows an authenticated user with Create or Rename permissions to bypass administrator-configured deny rules (both prefix-based and regex-based) by injecting .. sequences in the destination parameter of a PATCH request. As a result, the user can write or move files into any deny-rule-protected path within their scope. However, this cannot be used to escape the user's BasePathFs scope or read from restricted paths. This issue has been fixed in version 2.62.0.
- Affected
- filebrowser
- CVSS v3.1 GITHUB
- 6.5 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N - EPSS
- 0.46% chance of exploitation in the next 30 days, 39th percentile
- Published
- 2026-03-19
- Updated
- 2026-03-20
Proof-of-concept exploits (1)
Security advisories
- filebrowser/filebrowser/security/advisories/GHSA-9f3r-2vgw-m8xp
- filebrowser/filebrowser/commit/4bd7d69c82163b201a987e99c0c50d7ecc6ee5f1