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Anthropic Claude VS Code extension backdoored on Cursor platform

By PulseAugur Editorial · [1 sources] ·

An official Anthropic Claude VS Code extension was compromised and used to distribute a backdoor to potentially 5,000 developers. The malicious version, 2.1.313, was available on Cursor, an AI-assisted developer tool platform, and was active for nearly 12 hours before Anthropic released a clean version. The backdoor aimed to steal cloud credentials and source code by installing a persistent SSH backdoor on affected machines across Windows, macOS, and Linux. AI

IMPACT Highlights the security risks in AI-powered developer tools and the need for robust supply-chain security for AI model integrations.

RANK_REASON A security incident involving a third-party tool that integrated an AI model's official extension.

Read on Ars Technica — AI →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Anthropic Claude VS Code extension backdoored on Cursor platform

How we ranked this

Signal score
16 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Tool
A security incident involving a third-party tool that integrated an AI model's official extension.
Source corroboration
Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
Topics
product, safety
Editorial topic classification. Feeds into how the story surfaces on /topic/<slug> hub pages and into the per-entity coverage mix.
AI-industry relevance
High
Clearly on-topic for AI-industry coverage.
Story freshness
Breaking (< 6h)
Fresh story with cross-source coverage still developing. Ranking may shift as more sources report.

Full methodology in our editorial standards.

COVERAGE [1]

  1. Ars Technica — AI TIER_1 English(EN) · Dan Goodin ·

    Anthropic VS code extension on Cursor backdoored for nearly 12 hours

    It's still unknown how attackers got access to Anthropic's verified Cursor account.

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