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DeepSeek Harness Flaw Let AI Agents Disable Their Own File Sandbox Without Approval

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DeepSeek Harness Flaw Let AI Agents Disable Their Own File Sandbox Without Approval

DeepSeek Harness, an open-source tool for running artificial intelligence (AI) coding agents on developer machines, contained a flaw that allowed sandboxed agents to disable their own file sandbox protections with a single command. The vulnerability bypassed the intended security boundary that prevented agents from writing outside their designated workspace.

Why it matters: Developers using DeepSeek Harness to run AI agents on untrusted files face the risk that agents could escape sandbox restrictions and modify files outside their intended scope; review your deployment and update immediately if you use this tool.

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