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Cursor reports malicious Claude Code extension impacting at most 5,000 users
- Who
- Cursor
- What
- reported a security incident involving a modified Claude Code VS Code extension accessed through its IDE extension marketplace, affecting at most 5,000 users
- Quote
We identified a security incident affecting a modified Claude Code VS Code extension accessed through our Cursor IDE extension marketplace, impacting at most 5,000 users.
What happened
Cursor identified a security incident involving a modified Claude Code VS Code extension accessed through its IDE extension marketplace, impacting at most 5,000 users. The malicious version was not developed by Anthropic. The incident does not impact other extensions.
Read next
See the full storyCursor Reports Malicious Claude Code Extension Affecting at Most 5,000 UsersWe identified a security incident affecting a modified Claude Code VS Code extension accessed through our Cursor IDE extension marketplace, impacting at most 5,000 users. This malicious version of the extension was not developed by Anthropic. It does not impact other extensions
The story so far
Cursor said it identified a security incident involving a malicious, modified Claude Code VS Code extension accessed through the Cursor IDE extension marketplace, affecting at most 5,000 users. Cursor said Anthropic did not develop the malicious version and that the incident does not affect other extensions.
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