Does v0.dev generate secure authentication code?

v0.dev can generate login and signup UI components with form fields for email, password, and social login buttons, but these are purely visual components without real authentication logic. The generated code does not include password hashing, session management, JWT handling, or integration with authentication providers like NextAuth, Clerk, or Supabase Auth. Deploying v0-generated auth UI without connecting it to a proper authentication backend leaves the application completely unprotected. Developers must integrate a battle-tested auth library and properly configure secure session handling. UNPWNED scans for authentication weaknesses including missing auth on protected routes, insecure session cookies, and exposed API endpoints.