CVE-2026-32758 File Browser has an Access Rule Bypass via Path Traversal in Copy/Rename Destination Parameter
Authenticated users can bypass access rules to write or move files into restricted paths via path traversal in the rename destination parameter.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-32758?
CVE-2026-32758 is a medium-severity path traversal vulnerability in filebrowser, published on 19 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2026-32758?
4 open source packages ship an affected version, including github.com/filebrowser/filebrowser/v2 and github.com/filebrowser/filebrowser. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/filebrowser/filebrowser/v2 Go | All versions | 2.62.0 |
github.com/filebrowser/filebrowser/v2 Go | All versions | 2.62.0 |
github.com/filebrowser/filebrowser/v2 Go | All versions | 2.62.0 |
github.com/filebrowser/filebrowser Go | All versions | None |
Products include Filebrowser Filebrowser.
How do I fix CVE-2026-32758?
Upgrade github.com/filebrowser/filebrowser/v2 to 2.62.0 or later.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-32758 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-32758 exists.
Other vulnerabilities in filebrowser
- CVE-2026-32760 File Browser Self Registration Grants Any User Admin Access When Default Permissions Include Admin
- CVE-2026-29188 File Browser: TUS Delete Endpoint Bypasses Delete Permission Check
- CVE-2023-39612 Cross-site scripting in n/a
- CVE-2026-30934 FileBrowser Quantum: Stored XSS in public share page via unsanitized share metadata (text/template misuse)
- CVE-2021-46398 Cross-Site Request Forgery in Filebrowser
Sources
Also known as GHSA-9f3r-2vgw-m8xp, GO-2026-4711.