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Weitong Ruan

6 accepted papers

2026

How Catastrophic is Your LLM? Certifying Risk in Conversation

ICLR 2026poster

Large Language Models (LLMs) can produce catastrophic responses in conversational settings that pose serious risks to public safety and security. Existing evaluations often fail to fully reveal these vulnerabilities because they rely on fixed attack prompt sequences, lack statistical guarantees, and…

Cited by 0SourceScholar
2026

Security–Fidelity Tradeoffs: No Universal Defense Against Prompt Injection

ICML 2026spotlight

We identify a fundamental tension in securing LLMs: the \textbf{security--fidelity tradeoff}. While defenses against indirect prompt injection are becoming more robust, we show that they inevitably impair the model's ability to process benign, instruction-like text. Current evaluations miss this cos…

Cited by 0SourceScholar
2026

When Actions Go Off-Task: Detecting and Correcting Misaligned Actions in Computer-Use Agents

ICML 2026poster

Computer-use agents (CUAs) have made tremendous progress in the past year, yet they still frequently produce misaligned actions that deviate from the user's original intent. Such misaligned actions may arise from external attacks (e.g., indirect prompt injection) or from internal limitations (e.g., …

Cited by 0SourceScholar
2021

Contextual Domain Classification with Temporal Representations

NAACL 2021industry

In commercial dialogue systems, the Spoken Language Understanding (SLU) component tends to have numerous domains thus context is needed to help resolve ambiguities. Previous works that incorporate context for SLU have mostly focused on domains where context is limited to a few minutes. However, ther…

Cited by 1SourcePDFScholar
2020

Multi-task Learning of Spoken Language Understanding by Integrating N-Best Hypotheses with Hierarchical Attention

COLING 2020industry

Currently, in spoken language understanding (SLU) systems, the automatic speech recognition (ASR) module produces multiple interpretations (or hypotheses) for the input audio signal and the natural language understanding (NLU) module takes the one with the highest confidence score for domain or inte…

Cited by 8SourcePDFScholar