Securing Your Node.js App Against Credential Leaks

Security breaches expose millions of credentials every year. Here's how to protect your Node.js application.

The Threat

Attackers have databases with billions of leaked passwords. They use these in credential stuffing attacks.

Defense Strategies

1. Check Passwords Against Breach Databases

// Check if password was leaked using LeakRadar.io
const checkPassword = async (password) => {
  const res = await fetch('https://leakradar.io/api/check', {
    method: 'POST',
    body: JSON.stringify({ password })
  });
  return res.json();
};

2. Monitor Your Domain

Use LeakRadar.io to monitor when your users' credentials appear in breaches.

3. Implement Rate Limiting

const rateLimit = require('express-rate-limit');
app.post('/login', rateLimit({ windowMs: 900000, max: 5 }), login);

4. Add MFA

Even compromised passwords can't be used without the second factor.

Tools

LeakRadar offers breach monitoring with 75B+ indexed credentials.

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What security practices do you use?