CVE-2026-55667
File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to 2.63.16, a scoped, non-admin File Browser user holding only the Create permission can delete arbitrary files outside their scope (other tenants' data, and the application's own database) via the upload failure-cleanup path. ScopedFs.RemoveAll is the one dereferencing operation that skips the symlink guard every other method enforces. The direct-upload handler runs RemoveAll on the user-controlled path during failed-upload cleanup, gated only by Perm.Create. If an escaping directory symlink already exists inside the user's scope, an authenticated create-only user can delete an out-of-scope target, bypassing both the ScopedFs boundary and the Perm.Delete gate. This vulnerability is fixed in 2.63.16.
- Score
- CVSS 3.1 8.2 High
- Status
- Deferred - security-advisories@github.com
- Published
- 2026-06-25
- Last modified
- 2026-06-26
- Weaknesses
- CWE-22, CWE-59
Affected products
References
- https://github.com/filebrowser/filebrowser/security/advisories/GHSA-fmm7-x4gx-8jhr
