CVE-2026-25890
HIGHfilebrowser < 2.57.1 - Authenticated Authorization Bypass via Multiple Slash Path Manipulation
Title source: llmExploitation Summary
EIP tracks 2 public exploits for CVE-2026-25890. PoCs published by XiaomingX, mbanyamer.
AI-analyzed exploit summary This repository contains a functional exploit for CVE-2026-25890, an access control bypass in FileBrowser ≤ v2.57.0. The exploit leverages multiple leading slashes to bypass `strings.HasPrefix()` checks in the authorization middleware, allowing low-privileged users to read, upload, or delete restricted files.
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)
This repository contains a functional exploit for CVE-2026-25890, an access control bypass in FileBrowser ≤ v2.57.0. The exploit leverages multiple leading slashes to bypass `strings.HasPrefix()` checks in the authorization middleware, allowing low-privileged users to read, upload, or delete restricted files.
This repository contains a functional exploit for CVE-2026-25890, an access control bypass in FileBrowser ≤ v2.57.0. The exploit leverages multiple leading slashes to bypass `strings.HasPrefix()` checks while the filesystem still serves the canonical path.
References (3)
Scores
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N