ACM MM

PVDetector: Detecting Prompt Injection Attacks on Purpose-Specific LLM Agents through Policy-Violation Concept Analysis

PVDetector：通过策略违规概念分析检测针对特定目的大语言模型代理的提示注入攻击

Junhui Wang, Hangtao Zhang, Zhirun Zheng, Li Zeng, Jiejun Xiao, Xi Luo, Lihua Yin, Saiqin Long

AI总结 研究针对特定目的LLM代理的提示注入攻击，提出PVDetector框架，通过测量与离线派生的PV概念的隐藏状态对齐来检测攻击，实验表明该方法误报率低、开销小，性能优于现有方法。

Comments Accepted to ACM MM 2026. Code: https://github.com/Claresigle/PVDetector

MAR3: Multi-Agent Recognition, Reasoning, and Reflection for Reference Audio-Visual Segmentation

MAR3：多智能体识别、推理与反思用于参考音频视觉分割

Yuan Zhao, Zhenqi Jia, Yongqiang Zhang

AI总结 本文提出MAR3框架，通过多智能体机制解决参考音频视觉分割中的表达难度识别、模态主导性分析及反思学习问题，提升分割精度。

Comments Accepted by ACM MM 2026