CVE-2026-44542
FileBrowser Quantum: Unauthenticated Path Traversal in Public Share Delete Allows Arbitrary File Deletion
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.
INFO
Published Date :
May 14, 2026, 6:16 p.m.
Last Modified :
May 15, 2026, 6:09 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 3.1 | CRITICAL | MITRE-CVE |
Solution
- Update to FileBrowser Quantum 1.3.1-stable or later.
- Ensure delete permissions are restricted.
- Review file sharing configurations.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-44542.
| URL | Resource |
|---|---|
| https://github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-fwj3-42wh-8673 | Exploit Vendor Advisory |
| https://github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-fwj3-42wh-8673 | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-44542 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-44542
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-44542 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-44542 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
May. 15, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:gtsteffaniak:filebrowser_quantum:*:-:*:*:*:*:*:* versions up to (excluding) 1.3.1 *cpe:2.3:a:gtsteffaniak:filebrowser_quantum:*:beta:*:*:*:*:*:* versions up to (excluding) 1.3.9 Added Reference Type CISA-ADP: https://github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-fwj3-42wh-8673 Types: Exploit, Vendor Advisory Added Reference Type GitHub, Inc.: https://github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-fwj3-42wh-8673 Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
May. 15, 2026
Action Type Old Value New Value Added Reference https://github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-fwj3-42wh-8673 -
New CVE Received by [email protected]
May. 14, 2026
Action Type Old Value New Value 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H Added CWE CWE-22 Added Reference https://github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-fwj3-42wh-8673