# Cursor Says Modified Claude Code Extension Incident Affected Up to 5,000 Users

By Simon Yoon

Canonical URL: https://www.tokenpost.com/news/technology/44410
Published: 2026-10-30T08:22:23.000Z
Updated: 2026-10-30T08:22:23.000Z
Section: Technology

> The incident involved a VS Code extension accessed through Cursor’s IDE extension marketplace.

Cursor said a modified Claude Code extension for VS Code was involved in a security incident affecting up to 5,000 users after it was accessed through Cursor’s IDE extension marketplace.