WU, Zonglin; XUE, Yule; FENG, Yaoyao; WANG, Xiaolong; SONG, Yiren. MCA-Bench: A Multimodal Benchmark for Evaluating CAPTCHA Robustness Against VLM-based Attacks. Proceedings of the AAAI Conference on Artificial Intelligence, [S. l.], v. 40, n. 44, p. 38039–38047, 2026. DOI: 10.1609/aaai.v40i44.41141. Disponível em: https://ojs.aaai.org/index.php/AAAI/article/view/41141. Acesso em: 25 may. 2026.