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NZ
Researcher

Nir Zadok

researcher at OX Security

Led research discovering and disclosing critical CVSS 9.4 sandbox escape vulnerability in DeepSeek Harness that allowed confined agents to disable their own security confinement.

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May 2026 — Oct 2026
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A CVSS 9.4 sandbox escape hit the DeepSeek Harness agent runtime
Ox SecuritynegativeOct 9, 2026

“Led research discovering and disclosing critical CVSS 9.4 sandbox escape vulnerability in DeepSeek Harness that allowed confined agents to disable their own security confinement.”

GitHub Internal Repositories Breached
The Hacker NewsnegativeMay 21, 2026

“OX Security researcher who analyzed the trojanized Nx Console extension and described how the attack disguised malicious commands as routine MCP setup tasks.”