CVE-2026-25890

HIGH

Filebrowser < 2.57.1 - Incorrect Authorization

Title source: rule

Description

File Browser provides a file managing interface within a specified directory and it can be used to upload, delete, preview, rename and edit files. Prior to 2.57.1, an authenticated user can bypass the application's "Disallow" file path rules by modifying the request URL. By adding multiple slashes (e.g., //private/) to the path, the authorization check fails to match the rule, while the underlying filesystem resolves the path correctly, granting unauthorized access to restricted files. This vulnerability is fixed in 2.57.1.

Exploits (2)

github WORKING POC 10 stars

by XiaomingX · pythonpoc

https://github.com/XiaomingX/data-cve-poc-py-v1/tree/main/2026/CVE-2026-25890

View Code ZIP pw:eip

nomisec WORKING POC

by mbanyamer · poc

https://github.com/mbanyamer/CVE-2026-25890-FileBrowser-Access-Control-Bypass

View Code ZIP pw:eip

References (3)

[Patch] https://github.com/filebrowser/filebrowser/commit/489af403a19057f6b6b4b1dc0e48cbb26a202ef9

View Patch ZIP pw:eip

[Vendor Advisory] https://github.com/filebrowser/filebrowser/security/advisories/GHSA-4mh3-h929-w968

[Release Notes] https://github.com/filebrowser/filebrowser/releases/tag/v2.57.1

Scores

CVSS v3 8.1

EPSS 0.0001

EPSS Percentile 2.9%

Attack Vector NETWORK

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

Details

CWE

CWE-863 CWE-706

Status published

Products (2)

filebrowser/filebrowser < 2.57.1

filebrowser/filebrowser 0 - 2.57.1Go

Published Feb 09, 2026

Tracked Since Feb 18, 2026