Wu Z, Xue Y, Feng Y, Wang X, Song Y. MCA-Bench: A Multimodal Benchmark for Evaluating CAPTCHA Robustness Against VLM-based Attacks. AAAI [Internet]. 2026 Mar. 14 [cited 2026 May 25];40(44):38039-47. Available from: https://ojs.aaai.org/index.php/AAAI/article/view/41141