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.

CVSS v3 8.2 HIGH

8.2^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.8

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://github.com/filebrowser/filebrowser/security/advisories/GHSA-fmm7-x4gx-8jhr
https://github.com/filebrowser/filebrowser/security/advisories/GHSA-fmm7-x4gx-8jhr

Configurations

No configuration.

History

26 Jun 2026, 04:17

Type	Values Removed	Values Added
References	~~() https://github.com/filebrowser/filebrowser/security/advisories/GHSA-fmm7-x4gx-8jhr -~~	() https://github.com/filebrowser/filebrowser/security/advisories/GHSA-fmm7-x4gx-8jhr -

25 Jun 2026, 19:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-25 19:16

Updated : 2026-06-26 04:17

NVD link : CVE-2026-55667

Mitre link : CVE-2026-55667

CVE.ORG link : CVE-2026-55667

JSON object : View

Products Affected

No product.

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CWE-59

Improper Link Resolution Before File Access ('Link Following')

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