{"id":1225,"date":"2026-02-11T12:08:44","date_gmt":"2026-02-11T12:08:44","guid":{"rendered":"https:\/\/blog.ibvl.in\/index.php\/2026\/02\/11\/prompt-injection-via-road-signs\/"},"modified":"2026-02-11T12:08:44","modified_gmt":"2026-02-11T12:08:44","slug":"prompt-injection-via-road-signs","status":"publish","type":"post","link":"https:\/\/blog.ibvl.in\/index.php\/2026\/02\/11\/prompt-injection-via-road-signs\/","title":{"rendered":"Prompt Injection Via Road Signs"},"content":{"rendered":"<div>\n<p>Interesting research: \u201c<a href=\"https:\/\/arxiv.org\/pdf\/2510.00181\">CHAI: Command Hijacking Against Embodied AI<\/a>.\u201d<\/p>\n<blockquote>\n<p><b>Abstract:<\/b> Embodied Artificial Intelligence (AI) promises to handle edge cases in robotic vehicle systems where data is scarce by using common-sense reasoning grounded in perception and action to generalize beyond training distributions and adapt to novel real-world situations. These capabilities, however, also create new security risks. In this paper, we introduce CHAI (Command Hijacking against embodied AI), a new class of prompt-based attacks that exploit the multimodal language interpretation abilities of Large Visual-Language Models (LVLMs). CHAI embeds deceptive natural language instructions, such as misleading signs, in visual input, systematically searches the token space, builds a dictionary of prompts, and guides an attacker model to generate Visual Attack Prompts. We evaluate CHAI on four LVLM agents; drone emergency landing, autonomous driving, and aerial object tracking, and on a real robotic vehicle. Our experiments show that CHAI consistently outperforms state-of-the-art attacks. By exploiting the semantic and multimodal reasoning strengths of next-generation embodied AI systems, CHAI underscores the urgent need for defenses that extend beyond traditional adversarial robustness.<\/p>\n<\/blockquote>\n<p>News <a href=\"https:\/\/www.theregister.com\/2026\/01\/30\/road_sign_hijack_ai\/\">article<\/a>.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Interesting research: \u201cCHAI: Command Hijacking Against Embodied AI.\u201d Abstract: Embodied Artificial Intelligence (AI) promises to handle edge cases in robotic vehicle systems where data is scarce by using common-sense reasoning grounded in perception and action to generalize beyond training distributions and adapt to novel real-world situations. These capabilities, however, also create new security risks. In [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-container-style":"default","site-container-layout":"default","site-sidebar-layout":"default","disable-article-header":"default","disable-site-header":"default","disable-site-footer":"default","disable-content-area-spacing":"default","footnotes":""},"categories":[330,4,633,90,274,53],"tags":[91],"class_list":["post-1225","post","type-post","status-publish","format-standard","hentry","category-academic-papers","category-ai","category-cars","category-cybersecurity","category-hacking","category-uncategorized","tag-cybersecurity"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Prompt Injection Via Road Signs - Imperative Business Ventures Limited<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.ibvl.in\/index.php\/2026\/02\/11\/prompt-injection-via-road-signs\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Prompt Injection Via Road Signs - Imperative Business Ventures Limited\" \/>\n<meta property=\"og:description\" content=\"Interesting research: \u201cCHAI: Command Hijacking Against Embodied AI.\u201d Abstract: Embodied Artificial Intelligence (AI) promises to handle edge cases in robotic vehicle systems where data is scarce by using common-sense reasoning grounded in perception and action to generalize beyond training distributions and adapt to novel real-world situations. These capabilities, however, also create new security risks. 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