@inproceedings{cui-etal-2026-vortexpia, title = "{V}ortex{PIA}: Indirect Prompt Injection Attack against {LLM}s for Efficient Extraction of User Privacy", author = "Cui, Yu and Pan, Sicheng and Liu, Yifei and Zhang, Haibin and Zuo, Cong", editor = "Demberg, Vera and Inui, Kentaro and Marquez, Llu{\'i}s", booktitle = "Findings of the {A}ssociation for {C}omputational {L}inguistics: {EACL} 2026", month = mar, year = "2026", address = "Rabat, Morocco", publisher = "Association for Computational Linguistics", url = "https://preview.aclanthology.org/ingest-eacl/2026.findings-eacl.29/", pages = "587--609", ISBN = "979-8-89176-386-9" }