CVE-2026-54910

The record

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.

Affected packages

Related vulnerabilities

• CVE-2026-61725 sevenz-rust2 is a Rust-native 7z compressor and `decompress`or. CWE-22
• CVE-2026-62965 SABnzbd is an open source automated Usenet download tool. CWE-22
• CVE-2026-119342 Stirling-PDF is a locally hosted web application that facilitates various operations on… CWE-22
• CVE-2026-119328 Immich is a high-performance self-hosted photo and video management solution. CWE-22
• CVE-2026-116249 In server mode pgAdmin 4 resolves a server's password file, SSL certificate, key, CRL and… CWE-22
• CVE-2026-116240 In server mode pgAdmin 4 validates a path into the user's storage directory with… CWE-22
• CVE-2026-62331 praktor is a multi-agent Claude Code orchestrator with Telegram input and output, Docker… CWE-22
• CVE-2026-115604 Subscriber Arbitrary File Deletion in SureDash <= 1.12.3 versions. CWE-22