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MCP Security Tools in 2026: What Two Scanners Missed and One Gateway Rule Caught

This story is from 2026-10-12. It is preserved in the archive; the latest stories are on the live feed.

Connecting an MCP server to Claude Code or Cursor hands that server a slice of your model's prompt. The client forwards every tool description to the model, and the model reads that text as guidance, even though you will almost never open it yourself. Attackers have already used that. Koi Security…

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  1. 2026-10-12 18:00 · DEV Community — AI
    MCP Security Tools in 2026: What Two Scanners Missed and One Gateway Rule Caught

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