gtsteffaniak FileBrowser up to 1.4.2 Subtitles idx.GetRealPath path/name path traversal

Summaryinfo

A vulnerability identified as problematic has been detected in gtsteffaniak FileBrowser up to 1.4.2. This affects the function idx.GetRealPath of the component Subtitles Handler. Performing a manipulation of the argument path/name results in path traversal. This vulnerability was named CVE-2026-54910. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as problematic, was found in gtsteffaniak FileBrowser up to 1.4.2. This affects the function idx.GetRealPath of the component Subtitles Handler. The manipulation of the argument path/name with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality. The summary by CVE is:

FileBrowser Quantum is a free, self-hosted, web-based file manager. Prior to version 1.4.3-beta, the `subtitlesHandler` endpoint (`GET /api/media/subtitles`) accepts two user-controlled query parameters: `path` and `name`, both of which are used in filesystem operations without sanitization, creating two independent path traversal vectors. The primary vector is the `path` parameter: it is passed directly to `idx.GetRealPath()` without calling `SanitizeUserPath()`, allowing an attacker to escape the storage root and set `parentDir` to any directory on the host. No existing anchor file is required. The secondary vector is the `name` parameter: it is joined with `parentDir` via `filepath.Join(parentDir, name)` without stripping directory components, allowing traversal relative to any resolved `parentDir`. Any authenticated user (regardless of role or permissions) can exploit either vector to read any text file readable by the server process, including `/etc/passwd`, SSH keys, database credentials, and JWT signing keys. Version 1.4.3-beta patches the issue.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-54910 since 06/16/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

Upgrading to version 1.4.3-beta eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-45957). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• gtsteffaniak

Name

• FileBrowser

Version

• 1.4.0
• 1.4.1
• 1.4.2

Website

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

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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