CVE-2026-44542

FileBrowser Quantum: Unauthenticated Path Traversal in Public Share Delete Allows Arbitrary File Deletion

Published May 14, 2026 CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-fwj3-42wh-8673 FileBrowser Public Share DELETE API Path Traversal Allows Unauthenticated Arbitrary File Deletion
History
Type Values Removed Values Added
First Time appeared Gtsteffaniak filebrowser Quantum
CPEs cpe:2.3:a:gtsteffaniak:filebrowser_quantum:*:-:*:*:*:*:*:*
cpe:2.3:a:gtsteffaniak:filebrowser_quantum:*:beta:*:*:*:*:*:*
Vendors & Products Gtsteffaniak filebrowser Quantum
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Gtsteffaniak
Gtsteffaniak filebrowser
Vendors & Products Gtsteffaniak
Gtsteffaniak filebrowser
Type Values Removed Values Added
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.
Title FileBrowser Quantum: Unauthenticated Path Traversal in Public Share Delete Allows Arbitrary File Deletion
Weaknesses CWE-22
References
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
May 15, 2026, 3:03 PM
Reserved
May 6, 2026, 7:38 PM
Status
Analyzed
Published
May 14, 2026, 6:16 PM
Modified
Oct 25, 2026, 11:10 PM