gtsteffaniak filebrowser up to 1.3.0/1.3.8 path traversal

Summaryinfo

A vulnerability classified as critical was found in gtsteffaniak filebrowser up to 1.3.0/1.3.8. This impacts an unknown function. Such manipulation leads to path traversal. This vulnerability is traded as CVE-2026-44542. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, has been found in gtsteffaniak filebrowser up to 1.3.0/1.3.8. Affected by this issue is an unknown function. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is integrity, and availability. CVE summarizes:

FileBrowser Quantum is a free, self-hosted, web-based file manager. Prior to 1.3.1-stable and 1.3.9-beta, attacker-controlled path input is joined with a trusted base path prior to sanitization, allowing traversal sequences (e.g., ../) to escape the intended shared directory. As a result, an unauthenticated attacker possessing a valid public share hash with delete permissions enabled can delete arbitrary files outside the shared directory within the share owner’s configured storage scope. This affects public/api/resources and public/api/resources/bulk. This vulnerability is fixed in 1.3.1-stable and 1.3.9-beta.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-44542 since 05/06/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1006.

Upgrading to version 1.3.1-stable or 1.3.9-beta eliminates this vulnerability.

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Productinfo

Vendor

• gtsteffaniak

Name

• filebrowser

Version

• 1.0
• 1.1
• 1.2
• 1.3.0
• 1.3.1
• 1.3.2
• 1.3.3
• 1.3.4
• 1.3.5
• 1.3.6
• 1.3.7
• 1.3.8

Website

• Product: https://github.com/gtsteffaniak/filebrowser/

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