Official Claude Code Extension on Cursor Marketplace Trojanized with Persistent SSH Backdoor

Cybersecurity researchers have disclosed that a trojanized version of Anthropic's official Claude Code extension was distributed through the Cursor Marketplace as a legitimate update, attempting to install a persistent SSH backdoor on affected systems.

The malicious update, version 2.1.313, was distributed under the extension's legitimate publisher identity, prompting Cursor to temporarily shut

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id: 3904
uid: z2AMQ
insdate: 2026-10-30 13:10:27
title: Official Claude Code Extension on Cursor Marketplace Trojanized with Persistent SSH Backdoor
additional: Cybersecurity researchers have disclosed that a trojanized version of Anthropic's official Claude Code extension was distributed through the Cursor Marketplace as a legitimate update, attempting to install a persistent SSH backdoor on affected systems.

The malicious update, version 2.1.313, was distributed under the extension's legitimate publisher identity, prompting Cursor to temporarily shut
category: Cybersecurity
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guid: https://thehackernews.com/2026/10/official-claude-code-vs-code-extension.html
source_url: https://thehackernews.com/2026/10/official-claude-code-vs-code-extension.html
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