Checked fact 327431 Oct 2026Safety and security

The notice names Anthropic.claude-code versions 2.1.312 and 2.1.313 for Windows and macOS in the Cursor VS Code Extension Marketplace as malicious.

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The exact words it rests on

Anthropic.claude-code version 2.1.312 and 2.1.313 for Windows and MacOS . These malicious versions of the extension were not developed by Anthropic.

What the source said when we opened it, on 31 Oct 2026.

The source

Security notice: malicious Anthropic.claude-code versions in the Cursor VS Code Extension Marketplace
Cursor · 2026-10-29

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Checked

Checked by the notis newsroom on 31 Oct 2026, against the source above.

In the story

Cursor says Claude Code 2.1.312 and 2.1.313 on its marketplace were malicious and attempted to add an SSH key. 31 Oct 2026

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Short permanent address

In a sentence

“The notice names Anthropic.claude-code versions 2.1.312 and 2.1.313 for Windows and macOS in the Cursor VS Code Extension Marketplace as malicious.” ai notis, checked 31 Oct 2026. Source: Security notice: malicious Anthropic.claude-code versions in the Cursor VS Code Extension Marketplace (Cursor). https://ainotis.com/c/3274

As a reference (APA style)

ai notis. (2026, October 31). The notice names Anthropic.claude-code versions 2.1.312 and 2.1.313 for Windows and macOS in the Cursor VS Code Extension Marketplace as malicious [Checked claim 3274]. ai notis. https://ainotis.com/c/3274

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