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One task, one cell: I built a disposable sandbox that runs agent tasks with the network off

Two things broke in the same week. A Firecracker VM escape (CVE-2026-99999, 6 Nov 2026, front page of Hacker News) showed the isolation layer itself can fail. And the WebMCP Attack Lab (dev.to, 5 Nov 2026) showed a tool description injecting an instruction that bypassed a spending limit - the agent…

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  1. 2026-11-07 12:19 · DEV Community — AI
    One task, one cell: I built a disposable sandbox that runs agent tasks with the network off

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