15 articles tagged with "javascript"
Your Node.js app starts fine but turns into a RAM goblin after 48 hours. Memory leaks are sneaky, silent, and surprisingly easy to introduce — here's how to find and fix them before your ops team hunts you down.
You're using Math.random() to generate password reset tokens? A hacker can predict your 'random' numbers and own every account on your platform. Here's why crypto-insecure randomness is a silent killer — and how to fix it in 5 minutes.
Your app isn't vulnerable to SQL injection? Great. But have you audited your 847 node_modules for prototype pollution? No? Buckle up.
You wrote async/await everywhere, added a bunch of Promises, and yet somehow your Node.js server still goes unresponsive. Welcome to the Event Loop — the engine room nobody reads the manual for.
Node.js handles thousands of requests on a single thread — and no, it's not magic. It's the event loop. Here's how it actually works, why it's brilliant, and how to stop accidentally breaking it.
Node.js is single-threaded — and that's usually fine. Until you try to crunch a 50MB CSV on the main thread and your API response times hit 10 seconds. Enter Worker Threads: Node's built-in escape hatch for CPU-heavy work.
Cross-Site Scripting has been killing web apps since the 90s. It's embarrassingly simple, wildly misunderstood, and your React app probably isn't as safe as you think. Let's fix that.
Every Express request passes through a gauntlet of functions before getting a response. Understanding middleware turns you from someone who copy-pastes app.use() into someone who actually knows why it works.
You've sanitized your inputs, parameterized your queries, and patched your deps. But did you check if someone can silently corrupt every object in your Node.js app? Welcome to prototype pollution.
You're merging objects. Parsing JSON. Building APIs. Sounds harmless, right? Prototype pollution can turn innocent-looking JavaScript into a backdoor. Here's how it works and how to stop it.
You've been installing pub/sub libraries while Node.js ships one in the box. Let's fix that — EventEmitter is more powerful than you think.
You're merging an innocent JSON object and accidentally giving every object in your app admin privileges. Welcome to Prototype Pollution — the JavaScript vulnerability that makes SQL injection look obvious by comparison.
Loading a 2GB CSV into memory is like trying to drink from a firehose — you'll crash before you finish. Node.js Streams let you process data chunk by chunk, keeping your server fast, lean, and alive.
The Node.js event loop is the secret sauce behind its blazing speed — and also the first thing developers accidentally destroy. Learn how it works and how to stop choking it.
You've heard of SQL injection and XSS, but prototype pollution? This sneaky JavaScript attack lets hackers silently corrupt your entire app by mutating Object.prototype itself — and you probably have vulnerable code in production right now. Let's fix that.