Author

Pengfei Yang

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Preprint Aug 2026

ToolHazard: Scaling Adversarial Environments for Security Evaluation and Alignment of LLM-based Agents

Experiments reveal substantial agent vulnerabilities and show that injection timing and placement affect attack effectiveness, and ToolHazard-generated alignment data improves security on both ToolHazard-Bench and AgentDojo while preserving benign task utility.

Yutao Mou, Pengfei Yang, Zhenfei Yin et al. · 2 citations

Conference Open access 2026

RLShield: Dynamic Jailbreak Detection for LLMs via Reinforced Adaptive Learning

RLShield is a dynamic jailbreak detection framework that employs reinforcement learning for adaptive threshold selection and incorporates three key innovations: a dynamic retrieval and LLM-based rewriting module to simulate diverse adversarial contexts; a cross-layer representation analysis to pinpoint safety-critical...

Zhao Tong, Pengfei Yang, Yimeng Gu et al. · Annual Meeting of the Associ... · 0 citations