CVE-2026-44542
Last modified
CVE-2026-44542 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. 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. EPSS estimates a 0.52% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Gtsteffaniak | Filebrowser Quantum | < 1.3.1 | — |
| Gtsteffaniak | Filebrowser Quantum | < 1.3.9 | Beta |
References
- https://github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-fwj3-42wh-8673Exploit, Vendor Advisory
- https://github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-fwj3-42wh-8673Exploit, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
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