A Python script to check Next.js sites for corrupt middleware vulnerability (CVE-2025-29927).
The corrupt middleware vulnerability allows an attacker to bypass authentication and access protected routes by send a custom header x-middleware-subrequest.
Next JS versions affected: - 11.1.4 and up
[!WARNING] This tool is for educational purposes only. Do not use it on websites or systems you do not own or have explicit permission to test. Unauthorized testing may be illegal and unethical.
Installation
Clone the repo
git clone https://github.com/takumade/ghost-route.git
cd ghost-route
Create and activate virtual environment
python -m venv .venv
source .venv/bin/activate
Install dependencies
pip install -r requirements.txt
Usage
python ghost-route.py <url> <path> <show_headers>
<url>: Base URL of the Next.js site (e.g., https://example.com)<path>: Protected path to test (default: /admin)<show_headers>: Show response headers (default: False)
Example
Basic Example
python ghost-route.py https://example.com /admin
Show Response Headers
python ghost-route.py https://example.com /admin True
License
MIT License
