Prompt injection via road signs shown to hijack autonomous cars and drones
Researchers reported that autonomous vehicles and drones relying on vision-language models can be made to follow attacker instructions embedded in road signs, a form of prompt injection. Details beyond the report are limited.
Disclosed 30 January 2026 · Record updated 13 September 2026
Impact
Autonomous cars and drones were shown to obey malicious instructions presented on road signs, raising the risk of attacker-controlled vehicle behaviour.
Our coverage
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Sources
- theregister.comhttps://theregister.com/2026/01/30/road_sign_hijack_ai
