# Cursor Breach Exposes 5,000 Developers to Malicious Code Extension

> Source: <https://osintsights.com/cursor-breach-exposes-5000-developers-to-malicious-code-extension>
> Published: 2026-11-14 17:32:43+00:00

A single misplaced access key on a third-party AI provider's platform was all it took for hackers to breach Cursor's system, exposing 5,000 developers to malicious code via a tampered extension. The attackers used the compromised key to inject unauthorized code into the Cursor VS Code extension marketplace.