Author

Xiaohan Zhang

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Preprint Oct 2026

When Scene Text Hijacks the Scene: Uncovering, Exploiting, and Mitigating Rendered-Text Semantic Leakage in Image Generation Models

The reliability and accountability of image generative models (IGMs) are essential for building responsible and trustworthy AI systems. Recent IGMs, such as Nano Banana and GPT-Image, now support complex instruction following, realistic image synthesis, and controllable scene-text rendering. As these capabilities expan...

Fei-Fei Li, Run-Jie Wang, Xiao-Han Zhang et al. · 0 citations

Book Open access Aug 2026

ActivationBackdoor: Backdooring Large Language Models in Collaborative Inference via Intermediate Activations

This work proposes ActivationBackdoor, an inference-time backdoor attack that composes two activation-level components for trigger detection and backdoor behavior injection, and shows that ActivationBackdoor attains attack success comparable to training-time backdoor baselines while preserving high clean-task accuracy...

Zichun Su, Mi Zhang, Xiaohan Zhang et al. · Proceedings of the 32nd ACM... · 0 citations

Book Open access Aug 2026

ActivationBackdoor: Backdooring Large Language Models in Collaborative Inference via Intermediate Activations

Collaborative inference enables cost-effective deployment of large language models by partitioning layers across multiple participants and forwarding intermediate activations between participants in a pipeline, but these transmitted activations also create a new attack surface: a malicious participant can manipulate in...

Zichun Su, Mi Zhang, Xiaohan Zhang et al. · Proceedings of the 32nd ACM... · 0 citations