Security for your v0 app
v0 generates beautiful React and Next.js interfaces, but it focuses on the frontend: the backend security is on you. That is where exposed keys, unprotected fetches and "hidden" buttons that protect nothing slip in. Scan your app and confirm it.
Typical risks in v0
Client-side fetch with the key in plain sight
The code v0 generates often calls APIs directly from the component. If that call carries a key, it travels to the browser and anyone reads it in DevTools.
Actions that never check the session
v0 hides a button when you should not see it, but it does not validate the session on the server. The action is still a public URL anyone can call directly.
No headers or CSP by default
Being UI-first code, what comes out of v0 ships without security headers or a Content-Security-Policy. You must configure them wherever you deploy.
Related checks
Does your v0 app pass these checks?
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