Anthropic denies breach as tampered Claude Code extension hits Cursor users
Covered by 2 sources
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A tampered version of Anthropic's Claude Code extension was distributed via Cursor's marketplace on October 29, affecting up to 5,000 users by attempting to install an SSH backdoor. Anthropic denies any breach of its systems, and Cursor has removed the malicious versions, shut down and reopened its marketplace after mitigation efforts.
