JavaScript Sandboxes: Antipattern Review

Because the internet runs on JavaScript, and JavaScript is famously known as a language held together with paper clips and rubber bands, the topic of proper sandboxing and safe JS execution became a pretty popular discussion in the security community. I wanted to explore some small and common gotchas that I’ve seen in recent times regarding JS sandboxes, including and based off of a real-world example I saw at work. ...

Jul 24, 2026 · 2507 words · Vie