Papers by Jiachen Qian
"Penny Wise, Pixel Foolish": Bypassing Price Constraints in Multimodal Agents via Visual Adversarial Perturbations (2026.findings-acl)
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| Challenge: | Mobile Agents are a key component of the “Agentic Economy” where they perform high-stakes financial transactions. |
| Approach: | They propose a systemic vulnerability termed Visual Dominance Hallucination (VDH) VDH exploits the modality gap in CLIP-based encoders via a novel Semantic-Decoupling Loss. |
| Outcome: | The proposed framework exploits the modality gap in CLIP-based encoders by preserving fidelity. |
Visual Inception: Compromising Long-term Planning in Agentic Recommenders via Multimodal Memory Poisoning (2026.acl-long)
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| Challenge: | Existing research focuses on prompt injection or immediate adversarial misclassification of user-uploaded images. |
| Approach: | They propose a dual-process defense framework inspired by human cognition to mitigate this vulnerability by injecting triggers into user-uploaded images that act as "sleeper agents" |
| Outcome: | The proposed framework achieves about 85% Goal-Hit Rate (GHR) while reducing the risk to 10% with configurable latency trade-offs. |