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Backdoor in Claude Code for VS Code extension on the Cursor Marketplace

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Backdoor in Claude Code for VS Code extension on the Cursor Marketplace 871 pts · 513 comments · Oct 2026 871 pts · 513 comments · Oct 2026
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claude-code/CHANGELOG.md at main · anthropics/claude-code github.com github.com
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https://www.reuters.com/business/media-telecom/cursor-says-up-5000-users-affected-by-tampered-claude-code-extension-2026-10-30/ reuters.com reuters.com
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Security notice — malicious version of Anthropic.claude-code (2.1.313) identified in the Cursor Extension Marketplace cursor.com cursor.com
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cookiengineer/check-claude-code-exfil: :robot: (Vibecoded) Check for Indicators of Compromise for the ongoing Claude Code Extensions Exfil campaign github.com github.com
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Extensions | Cursor Docs cursor.com cursor.com
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