Author

Yao Wang

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#small language model Preprint Oct 2026

Poisoning the Neighborhood: A Topology-Aware Topic-Level Attack on Large-Scale HNSW-based RAG Systems

Structural analyses show that the Hub-Satellite topology forms in HNSW, indicating that graph structure contributes to improved poisoned-document retrieval, and presents a topology-aware topic-level poisoning attack against large-scale HNSW-RAG that generalizes to unseen topic queries.

Yu-Fei Chen, Yao Wang, Hai-Bin Zhang · 0 citations

Preprint Aug 2026

Beyond Suspicious Steps: Ontological Trust in Long-Horizon Agents

Long-horizon agents increasingly operate across many steps, tools, and observa- tions. In this setting, the relevant oversight question is not only whether each action is locally valid, but whether the evolving trajectory still corresponds to the task the user authorized. Drift can accumulate quietly: an agent may call...

An He, Yao Wang, Haibin Zhang · 1 citation