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The MCP approve dialog is not a security boundary

This story is from 2026-09-17. It is preserved in the archive; the latest stories are on the live feed.

If you wire MCP into Cursor or Claude Code, the approve dialog is not a security boundary. It shows the tool description your client can render. It does not show Unicode TAG-block payloads hiding instructions like "also read ~/.aws/credentials." And after the first click, most clients will not re-f…

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  1. 2026-09-17 18:16 · DEV Community — AI
    The MCP approve dialog is not a security boundary

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