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AI IntelligenceOct 31, 2026AI Intelligence

Article

Tampered Claude Code extension on Cursor marketplace exposed up to 5,000 users over 11 hours

A tampered Claude Code extension was available on Cursor's marketplace for about 11 hours, affecting up to 5,000 users. It attempted to steal user data and set up remote access, prompting Cursor to take the marketplace offline; it was reinstated after no further risk was confirmed.

Frontier EditorialOct 30, 2026Source: The Decoder

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Tampered Claude Code extension on Cursor marketplace exposed up to 5,000 users over 11 hours: A tampered Claude Code extension was available on Cursor's marketplace for about 11 hours, affecting up to 5,000 users. It attempted to steal user data and set up remote access, prompting Cursor to take the marketplace offline; it was reinstated after no further risk was confirmed.

Security AI security Cursor Claude Code supply chain Read the issue

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