AI Market Movers · Applied AI & software
Anysphere
Private
Anysphere makes Cursor, the coding tool that made an AI editor feel like the default. The company is in San Francisco.
- Site
- cursor.com
- Product
- Cursor
- Who
- Michael Truell, CEO
On X
We’re working with Cursor on this incident, but it wasn’t a compromise of Anthropic’s systems or employee laptops. A malicious actor used access to Cursor’s marketplace to publish a tampered copy of the Claude Code extension, which we didn’t build or publish.
— Felix Rieseberg (@felixrieseberg) Oct 30, 2026
‼️ Anthropic's official Claude Code extension was distributed with an SSH backdoor via Cursor's marketplace. A trojanized update (v2.1.313) targeted up to 5,000 users, according to Cursor. How attackers pushed it under the legitimate extension's identity remains unclear.
— The Hacker News (@TheHackersNews) Oct 30, 2026
Latest news
Ars Technica
Backdoored Claude Code extension sat in Cursor's marketplace for nearly 12 hoursA tampered build of Anthropic's Claude Code extension (versions 2.1.312 and 2.1.313) was available in Cursor's VS Code extension marketplace from about 2:27am to 1:35pm PT on Oct…
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