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Tianyu Du

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#artificial intelligence Preprint Sep 2026

StateTree: Enhancing Long-Term Dialogue Reasoning via Reinforcement Learning

Large language models deployed as personalized assistants must reason over long, evolving interaction histories. However, in long-term dialogue reasoning, relevant evidence is scattered across sessions, preferences may be revised over time, and standard long-context training fails to address these challenges under data...

Na-En Xu, Wan-Qing Cui, Yi-Bo Hu et al. · 0 citations
Jul 2026

Decision-Level Hijacking: Injecting Cognitive Bias into Large Language Models via Bit-Flip Attacks

It is revealed that Bit-Flip Attacks (BFAs) can serve as an attack vector for inducing decision-level hijacking, requiring no real-time interaction or control over the training process, and only a minimal number of weight bits need to be flipped after deployment to achieve stealthy, low-cost, and persistent cognitive m...

Yu Yan, Jia-Hao Chen, Si-Qi Lu et al. · 0 citations
#natural language process... Preprint Aug 2026

Beyond the Payload: How User Invocation Shapes Coding Agent Vulnerability to Repository Poisoning

CIPR (Coding In Poisoned Repos), the first benchmark that systematically varies PLCs in poisoned real-world repositories, is introduced and highlights that coding agent vulnerability is not a static property, but a dynamic outcome shaped by everyday user configurations.

Fu-Kang Zhu, Bin-Bin Zhao, Rui-Xiao Lin et al. · 0 citations
Preprint Aug 2026

Beyond Over-Refusal: Defending Indirect Prompt Injection via Latent Instruction Manifolds

AEGIS (Adaptive Ensemble Guard for Injection Shielding) extracts instruction-sensitive projectors to identify malicious instructions and leverages a Unified Multi-Layer Consensus mechanism that aggregates topologically distinct signals across the network depth.

Jia-Hao Chen, Ruiping Yin, Xin-Feng Li et al. · 1 citation · ⚡1
Book Open access Aug 2026

The Boy Who Cried Wolf: Adversarial Misclassification of Safe Inputs as Unsafe in Multimodal Guardrails

Unsafe Semantic Distillation is proposed, which aligns adversarial perturbations with distributional representations of unsafe content rather than prompt-specific instances, and achieves 84% attack success rates, outperforming existing methods and exposing fundamental vulnerabilities in current multimodal safety archit...

Shuo Shi, Ruiping Yin, Na-En Xu et al. · 1 citation

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