Mengyao Du
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126
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Crypto×1AI×1
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2026
SnapGuard: Lightweight Prompt Injection Detection for Screenshot-Based Web Agents
SnapGuard proposes a lightweight, multimodal method to detect prompt injection attacks in screenshot-based web agents by analyzing visual stability and contrast-polarity textual signals, achieving high accuracy with significantly reduced computational overhead.
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Papers
cs.CRcs.AIRecentApr 28, 2026
SnapGuard: Lightweight Prompt Injection Detection for Screenshot-Based Web Agents
Mengyao Du, Han Fang, Haokai Ma, Jiahao Chen +3 more
SnapGuard proposes a lightweight, multimodal method to detect prompt injection attacks in screenshot-based web agents by analyzing visual stability and contrast-polarity textual signals, achieving hig…
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