
Cursor Removes Malicious Claude Code 2.1.313 Extension From Its Marketplace
Socket's analysis of the reported malicious Claude Code extension 2.1.313, which Cursor confirmed was served from its own marketplace on 29 October 2026 to up to 5,000 users. Open VSX's change feed (3,392 events) and npm metadata hold no publication or removal record for that version, contradicting the initial OpenSourceMalware claim. Cursor published hashes, IOCs and remediation scripts.
Supply Chain, Threat IntelΒ· Published and added 30 Oct 2026























