Tampered Claude Code extension appears in Cursor extension marketplace, affecting up to 5,000 users
Cursor said that a tampered Claude Code VS Code extension appeared in its IDE extension marketplace, affecting up to 5,000 users; the malicious version was not developed by Anthropic. Cursor took down the extension marketplace the same day, worked with relevant service providers to remove the malware, and after confirming there was no further risk, restored it online and required all users to upgrade to Claude Code for VS Code version 2.1.314.
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