On Robustness of Vision-Language-Action Model against Multi-Modal Perturbations - Guo, Jianing; Wu, Zhenhong; Tu, Chang; Ma, Yiyao; Kong, Xiangqi; Liu, Zhiqian; Ji, Jiaming; Zhang, Shuning; Chen, Yuanpei; Chen, Kai; Dou, Qi; Yang, Yaodong; et al. (International Conference on Learning Representations, 2026)