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Understanding and addressing potential safety alignment risks in large language models (LLMs) is critical for ensuring their safe and trustworthy deployment. In this paper, we highlight an insidious safety threat: a compromised LLM can…

Machine Learning · Computer Science 2026-03-24 Guangnian Wan , Xinyin Ma , Gongfan Fang , Xinchao Wang

Existing attacks against multimodal language models (MLLMs) primarily communicate instructions through text accompanied by adversarial images. In contrast, we exploit the capabilities of MLLMs to interpret non-textual instructions,…

Cryptography and Security · Computer Science 2025-06-03 Jiahui Geng , Thy Thy Tran , Preslav Nakov , Iryna Gurevych

The ability to reflect on and correct failures is crucial for robotic systems to interact stably with real-life objects.Observing the generalization and reasoning capabilities of Multimodal Large Language Models (MLLMs), previous approaches…

Robotics · Computer Science 2024-11-19 Chuyan Xiong , Chengyu Shen , Xiaoqi Li , Kaichen Zhou , Jeremy Liu , Ruiping Wang , Hao Dong

Hallucination in large language models (LLMs) remains a critical barrier to their safe deployment. For hallucination detection to be practical in real-world scenarios, the use of efficient small models is essential to ensure low latency and…

Artificial Intelligence · Computer Science 2026-03-05 Zepeng Bao , Shen Zhou , Qiankun Pi , Jianhao Chen , Mayi Xu , Ming Zhong , Yuanyuan Zhu , Tieyun Qian

Single-turn safety evaluation is a poor proxy for real fraud defense, where attackers escalate across multiple rounds. This paper evaluates fraud defenders under replay and adaptive multi-round attacks and measures when a defender refuses,…

Cryptography and Security · Computer Science 2026-05-21 Laura Jiang , Reza Ryan , Qian Li , Nasim Ferdosian

Human guidance in reinforcement learning (RL) is often impractical for large-scale applications due to high costs and time constraints. Large Language Models (LLMs) offer a promising alternative to mitigate RL sample inefficiency and…

Machine Learning · Computer Science 2024-11-25 Maryam Shoaeinaeini , Brent Harrison

Intent-obfuscation-based jailbreak attacks on multimodal large language models (MLLMs) transform a harmful query into a concealed multimodal input to bypass safety mechanisms. We show that such attacks are governed by a…

Artificial Intelligence · Computer Science 2026-05-08 Md Farhamdur Reza , Richeng Jin , Tianfu Wu , Huaiyu Dai

Multimodal large language models (MLLMs) are increasingly deployed in real-world systems, yet their safety under adversarial prompting remains underexplored. We present a two-phase evaluation of MLLM harmlessness using a fixed benchmark of…

Computation and Language · Computer Science 2026-02-05 Casey Ford , Madison Van Doren , Emily Dix

While there has been progress towards aligning Large Language Models (LLMs) with human values and ensuring safe behaviour at inference time, safety guards can easily be removed when fine tuned on unsafe and harmful datasets. While this…

Large Language Models (LLMs) are increasingly relied upon for complex workflows, yet their ability to maintain flow of instructions remains underexplored. Existing benchmarks conflate task complexity with structural ordering, making it…

Artificial Intelligence · Computer Science 2026-01-28 Andrew Jaffe , Noah Reicin , Jinho D. Choi

Multimodal Large Language Models (MLLMs) have achieved impressive performance and have been put into practical use in commercial applications, but they still have potential safety mechanism vulnerabilities. Jailbreak attacks are red teaming…

Cryptography and Security · Computer Science 2025-06-30 Shiji Zhao , Ranjie Duan , Fengxiang Wang , Chi Chen , Caixin Kang , Shouwei Ruan , Jialing Tao , YueFeng Chen , Hui Xue , Xingxing Wei

Large Language Models (LLMs) have achieved tremendous success in various tasks, yet concerns about their safety and security have emerged. In particular, they pose risks of generating harmful content and are vulnerable to jailbreaking…

Cryptography and Security · Computer Science 2026-04-21 Zeming Wei , Chengcan Wu , Meng Sun

Large Multimodal Reasoning Models (LMRMs) are moving into real applications, where they must be both useful and safe. Safety is especially challenging in multimodal settings: images and text can be combined to bypass guardrails, and single…

Artificial Intelligence · Computer Science 2025-10-07 Yizhuo Ding , Mingkang Chen , Qiuhua Liu , Fenghua Weng , Wanying Qu , Yue Yang , Yugang Jiang , Zuxuan Wu , Yanwei Fu , Wenqi Shao

Recently, multimodal large language models (MLLMs) have emerged as a unified paradigm for language and image generation. Compared with diffusion models, MLLMs possess a much stronger capability for semantic understanding, enabling them to…

Computer Vision and Pattern Recognition · Computer Science 2026-03-26 Ye Leng , Junjie Chu , Mingjie Li , Chenhao Lin , Chao Shen , Michael Backes , Yun Shen , Yang Zhang

Vision-Language Models (VLMs) have remarkable abilities in generating multimodal reasoning tasks. However, potential misuse or safety alignment concerns of VLMs have increased significantly due to different categories of attack vectors.…

Computer Vision and Pattern Recognition · Computer Science 2025-10-24 Md Jueal Mia , M. Hadi Amini

The expansion of Multimodal Large Language Models (MLLMs) and their integration into autonomous agentic workflows has introduced a non-stationary attack surface. Empirical observations indicate that adversaries employ progressive,…

Cryptography and Security · Computer Science 2026-05-20 Doohee You

With the increasing adoption of large language models (LLMs), ensuring the safety of LLM systems has become a pressing concern. External LLM-based guardrail models have emerged as a popular solution to screen unsafe inputs and outputs, but…

Computation and Language · Computer Science 2025-10-08 Yining She , Daniel W. Peterson , Marianne Menglin Liu , Vikas Upadhyay , Mohammad Hossein Chaghazardi , Eunsuk Kang , Dan Roth

Adaptive prompting mechanisms have been proposed to enhance vision-language models by dynamically tailoring prompts to inputs. However, in frozen few-shot prompt learning with CLIP-style backbones, we systematically observe that adaptive…

Machine Learning · Computer Science 2026-05-12 Yunxuan Fang , Ziwei Zhang , Xinhe Wang

Jailbreak attacks pose a serious threat to the safety of Large Language Models (LLMs) by crafting adversarial prompts that bypass alignment mechanisms, causing the models to produce harmful, restricted, or biased content. In this paper, we…

Machine Learning · Computer Science 2025-08-22 Xiangman Li , Xiaodong Wu , Qi Li , Jianbing Ni , Rongxing Lu

Multi-modal Large Language Models (MLLMs) excel in vision-language tasks but remain vulnerable to visual adversarial perturbations that can induce hallucinations, manipulate responses, or bypass safety mechanisms. Existing methods seek to…

Computer Vision and Pattern Recognition · Computer Science 2025-02-04 Hashmat Shadab Malik , Fahad Shamshad , Muzammal Naseer , Karthik Nandakumar , Fahad Khan , Salman Khan