Prompt-Unknown Promotion Attacks against LLM-based Sequential Recommender Systems.

@inproceedings{lee-2026-promptunknown, author = {Seolhwa Lee and Yuchuan Zhao and Hongzhi Yin and Pengfei Wang and Anders S{\o}gaard and Tong Chen and Junliang Yu and Wei-Jing Zhu and Zongwei Wang and Lizhen Cui and Hongzhi Yin and Pengfei Wang}, editor = {Hannah Bast and Alistair Moffat and Falk Scholer and Marc Najork and Min Zhang and Hannah Bast and Marc Najork and Min Zhang}, title = {{Prompt-Unknown Promotion Attacks against LLM-based Sequential Recommender Systems}}, booktitle = {{Proceedings of the 49th International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2026, MelbourneVICAustralia, July 20-24, 2026}}, pages = {2453--2463}, publisher = {ACM}, year = {2026}, url = {https://doi.org/10.1145/3805712.3809691}, doi = {https://doi.org/10.1145/3805712.3809691} }