WebAgentGuard: A Reasoning-Driven Guard Model for Detecting Prompt Injection Attacks in Web Agents

arXiv:2604.12284 · cs.CR · Submitted 2026-04-14 · Read on arXiv

cs.CR

Submitted: 2026-04-14

Updated: 2026-10-23

Terminology

• Fine-Tuning — 2× in this paper · explained in 5 episodes
• Prompt Injection Attacks — 2× in this paper · explained in 2 episodes
• Benchmark — 1× in this paper · explained in 2 episodes
• Decoupling — 1× in this paper · explained in 2 episodes
• Information Leakage — 1× in this paper · explained in 2 episodes
• Multimodal Dataset — 1× in this paper · explained in 2 episodes
• Reinforcement Learning — 1× in this paper · explained in 4 episodes
• Vision-Language Models (VLMs) — 1× in this paper · explained in 7 episodes
• Vision-language models — 1× in this paper · explained in 2 episodes

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