@inproceedings{xu-etal-2026-harm, title = "Do No Harm: Exposing Hidden Vulnerabilities of {LLM}s via Persona-based Client Simulation Attack in Psychological Counseling", author = "Xu, Qingyang and Shen, Yaling and Fong, Stephanie and Wang, Zimu and Jiang, Yiwen and Zhao, Xiangyu and Liu, Jiahe and Xu, Zhongxing and Lee, Vincent and Ge, Zongyuan", editor = "Lee, Hung-Yi and Dev, Sunipa and Li, Jessy and Elliott, Desmond", booktitle = "Findings of the {A}ssociation for {C}omputational {L}inguistics: {EMNLP} 2026", month = oct, year = "2026", address = "Budapest, Hungary", publisher = "Association for Computational Linguistics", url = "https://aclanthology.org/2026.findings-emnlp.1791/", pages = "38307--38325", ISBN = "979-8-89176-462-0" }