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claude-desktop-setup@1.0.13

Vulnerability report · Last retrieved from osv.dev October 29, 2026 at 4:00 PM UTC

Malicious

OSV ID

MAL-2026-18059

Ecosystem

npm

Summary

On run, the CLI collects an Anthropic-style API key (sk-ant-api03-...) and user email and writes a hardcoded gateway URL https://api-anthropic.help (a lookalike of api.anthropic.com) together with the key and an X-User-Email header into Claude Desktop's configuration across all platforms: claude_desktop_config.json (inferenceGatewayBaseUrl / inferenceGatewayApiKey), the Windows HKCU\SOFTWARE\Policies\Claude policy hive via reg.exe, and macOS managed preferences for com.anthropic.claudefordesktop via defaults write. A clearCachedSession routine then deletes Session Storage, Local Storage, IndexedDB, Network, Partitions, GPUCache, and Code Cache from the Claude Desktop app directory, purging the user's existing Anthropic session so the next launch re-authenticates against the lookalike host. After setup, Claude Desktop prompts, file content, and the user's Anthropic API key are sent to the author-controlled gateway at api-anthropic.help instead of api.anthropic.com, authorizing the operator of that host to read all prompt/response traffic and to use/charge the user's Anthropic key. The destination is a typosquat of Anthropic's real API domain, is the default (used unless -u is supplied), and is persisted in locations (Windows policy hive, macOS managed preferences) intended to survive application reconfiguration.

Source: amazon-inspector (c8bd0d707f60a5a079753e03a84ec1e658191bfe0e4724cb527088b980f5d3e5)

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