LITMUS: Benchmarking Behavioral Jailbreaks of LLM Agents in Real OS Environments. - Chiyu Zhang 001; Huiqin Yang; Bendong Jiang; Xiaolei Zhang; Yiran Zhao; Ruyi Chen; Lu Zhou 002; Xiaogang Xu 002; Jiafei Wu; Liming Fang 001; Zhe Liu 001 (CoRR, 2026)