CVE-2026-44542

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.

CVSS 3.1

9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

EPSS

0.5% chance of exploitation in the next 30 days; higher than 44% of CVEs (scores of 2026-10-25)

CWE

CWE-22

Published

2026-05-14

Modified

2026-10-25

Record from

the NVD, synced 2026-10-25

Affected

• gtsteffaniak:filebrowser_quantum

Packages (OSV)

References

• https://github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-fwj3-42wh-8673
• https://github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-fwj3-42wh-8673

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