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Vision Language Models (VLMs) have shown remarkable performance, but are also vulnerable to backdoor attacks whereby the adversary can manipulate the model's outputs through hidden triggers. Prior attacks primarily rely on single-modality…

Computer Vision and Pattern Recognition · Computer Science 2025-06-10 Zhiyuan Zhong , Zhen Sun , Yepang Liu , Xinlei He , Guanhong Tao

With the significant development of large models in recent years, Large Vision-Language Models (LVLMs) have demonstrated remarkable capabilities across a wide range of multimodal understanding and reasoning tasks. Compared to traditional…

Computer Vision and Pattern Recognition · Computer Science 2024-07-15 Daizong Liu , Mingyu Yang , Xiaoye Qu , Pan Zhou , Yu Cheng , Wei Hu

Recent advances in Large Vision-Language Models (LVLMs) have showcased strong reasoning abilities across multiple modalities, achieving significant breakthroughs in various real-world applications. Despite this great success, the safety…

Computation and Language · Computer Science 2024-12-02 Chenhang Cui , Gelei Deng , An Zhang , Jingnan Zheng , Yicong Li , Lianli Gao , Tianwei Zhang , Tat-Seng Chua

Toxicity detection in multimodal text-image content faces growing challenges, especially with multimodal implicit toxicity, where each modality appears benign on its own but conveys hazard when combined. Multimodal implicit toxicity appears…

Multimedia · Computer Science 2025-05-21 Shiyao Cui , Qinglin Zhang , Xuan Ouyang , Renmiao Chen , Zhexin Zhang , Yida Lu , Hongning Wang , Han Qiu , Minlie Huang

Recent advances in instruction tuning have led to the development of State-of-the-Art Large Multimodal Models (LMMs). Given the novelty of these models, the impact of visual adversarial attacks on LMMs has not been thoroughly examined. We…

Computer Vision and Pattern Recognition · Computer Science 2023-12-11 Xuanming Cui , Alejandro Aparcedo , Young Kyun Jang , Ser-Nam Lim

Multimodal Large Language Models (MLLMs) integrate vision and text to power applications, but this integration introduces new vulnerabilities. We study Image-based Prompt Injection (IPI), a black-box attack in which adversarial instructions…

Computer Vision and Pattern Recognition · Computer Science 2026-03-05 Neha Nagaraja , Lan Zhang , Zhilong Wang , Bo Zhang , Pawan Patil

Pre-trained vision-language models (VLMs) have showcased remarkable performance in image and natural language understanding, such as image captioning and response generation. As the practical applications of vision-language models become…

Computer Vision and Pattern Recognition · Computer Science 2024-11-26 Peng Xie , Yequan Bie , Jianda Mao , Yangqiu Song , Yang Wang , Hao Chen , Kani Chen

Large Vision-Language Models (LVLMs) empower autonomous mobile agents, yet their security under realistic mobile deployment constraints remains underexplored. While agents are vulnerable to visual prompt injections, stealthily executing…

Cryptography and Security · Computer Science 2026-04-10 Renhua Ding , Xiao Yang , Zhengwei Fang , Jun Luo , Kun He , Jun Zhu

Multimodal Large Language Models (MLLMs) achieve strong reasoning and perception capabilities but are increasingly vulnerable to jailbreak attacks. While existing work focuses on explicit attacks, where malicious content resides in a single…

Cryptography and Security · Computer Science 2026-04-28 Xu Zhang , Hao Li , Zhichao Lu

With the significant advancement of Large Vision-Language Models (VLMs), concerns about their potential misuse and abuse have grown rapidly. Previous studies have highlighted VLMs' vulnerability to jailbreak attacks, where carefully crafted…

Computer Vision and Pattern Recognition · Computer Science 2025-06-19 Yu Wang , Xiaofei Zhou , Yichen Wang , Geyuan Zhang , Tianxing He

Large Language Models (LLMs) are being enhanced with the ability to use tools and to process multiple modalities. These new capabilities bring new benefits and also new security risks. In this work, we show that an attacker can use visual…

Cryptography and Security · Computer Science 2023-10-06 Xiaohan Fu , Zihan Wang , Shuheng Li , Rajesh K. Gupta , Niloofar Mireshghallah , Taylor Berg-Kirkpatrick , Earlence Fernandes

Visual language model (VLM) is rapidly being integrated into safety-critical systems such as autonomous driving, making it an important attack surface for potential backdoor attacks. Existing backdoor attacks mainly rely on unimodal,…

Computer Vision and Pattern Recognition · Computer Science 2026-04-07 Jiancheng Wang , Lidan Liang , Yong Wang , Zengzhen Su , Haifeng Xia , Yuanting Yan , Wei Wang

Large Vision-Language Models (LVLMs) have shown remarkable capabilities across a wide range of multimodal tasks. However, their integration of visual inputs introduces expanded attack surfaces, thereby exposing them to novel security…

Computation and Language · Computer Science 2025-05-29 Juan Ren , Mark Dras , Usman Naseem

Attracted by the impressive power of Multimodal Large Language Models (MLLMs), the public is increasingly utilizing them to improve the efficiency of daily work. Nonetheless, the vulnerabilities of MLLMs to unsafe instructions bring huge…

Computer Vision and Pattern Recognition · Computer Science 2024-06-21 Xin Liu , Yichen Zhu , Yunshi Lan , Chao Yang , Yu Qiao

Fusing visual understanding into language generation, Multi-modal Large Language Models (MLLMs) are revolutionizing visual-language applications. Yet, these models are often plagued by the hallucination problem, which involves generating…

Machine Learning · Computer Science 2025-01-28 Yining Wang , Mi Zhang , Junjie Sun , Chenyue Wang , Min Yang , Hui Xue , Jialing Tao , Ranjie Duan , Jiexi Liu

Social media platforms are being increasingly used by malicious actors to share unsafe content, such as images depicting sexual activity, cyberbullying, and self-harm. Consequently, major platforms use artificial intelligence (AI) and human…

Computer Vision and Pattern Recognition · Computer Science 2024-01-23 Mazal Bethany , Brandon Wherry , Nishant Vishwamitra , Peyman Najafirad

Large Vision-Language Models (LVLMs) rely on attention-based retrieval of safety instructions to maintain alignment during generation. Existing attacks typically optimize image perturbations to maximize harmful output likelihood, but suffer…

Computer Vision and Pattern Recognition · Computer Science 2026-04-14 Jingru Li , Wei Ren , Tianqing Zhu

Multimodal Large Language Models (MLLMs) have become powerful and widely adopted in some practical applications. However, recent research has revealed their vulnerability to multimodal jailbreak attacks, whereby the model can be induced to…

Computer Vision and Pattern Recognition · Computer Science 2025-09-23 Ziyi Zhang , Zhen Sun , Zongmin Zhang , Jihui Guo , Xinlei He

Multimodal Large Language Models (MLLMs) have achieved remarkable success in cross-modal understanding and generation, yet their deployment is threatened by critical safety vulnerabilities. While prior works have demonstrated the…

Cryptography and Security · Computer Science 2026-04-22 Kun Wang , Cheng Qian , Miao Yu , Lilan Peng , Liang Lin , Jiaming Zhang , Tianyu Zhang , Yu Cheng , Yang Wang

The security concerns surrounding Large Language Models (LLMs) have been extensively explored, yet the safety of Multimodal Large Language Models (MLLMs) remains understudied. In this paper, we observe that Multimodal Large Language Models…

Computer Vision and Pattern Recognition · Computer Science 2024-06-21 Xin Liu , Yichen Zhu , Jindong Gu , Yunshi Lan , Chao Yang , Yu Qiao