Black Hat Demo: Simple QR Code Breaks Gemini and Hijacks Unitree Robot

MarcoFigueroa · x · 2026-08-09

At the Black Hat USA security conference, researchers demonstrated an attack technique dubbed Kinetic Prompt Injection.

By using a simple QR code, the researchers successfully executed a prompt injection attack against Google's Gemini model. Due to vulnerabilities in how LLMs process multimodal inputs, the malicious instructions embedded in the image were parsed, causing a Unitree robot powered by the model to exhibit erratic behavior and act like a "rabid attack dog."

This research highlights that as AI agents are integrated into the physical world, prompt injection attacks can transcend digital data exfiltration, resulting in actual physical harm with a real-world blast radius.

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