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Vision-language models (VLMs) have significantly advanced autonomous driving (AD) by enhancing reasoning capabilities. However, these models remain highly vulnerable to adversarial attacks. While existing research has primarily focused on…

Computer Vision and Pattern Recognition · Computer Science 2026-04-22 Tianyuan Zhang , Lu Wang , Xinwei Zhang , Yitong Zhang , Boyi Jia , Siyuan Liang , Shengshan Hu , Qiang Fu , Aishan Liu , Xianglong Liu

In this paper, we study the harmlessness alignment problem of multimodal large language models (MLLMs). We conduct a systematic empirical analysis of the harmlessness performance of representative MLLMs and reveal that the image input poses…

Computer Vision and Pattern Recognition · Computer Science 2025-01-14 Yifan Li , Hangyu Guo , Kun Zhou , Wayne Xin Zhao , Ji-Rong Wen

Vision language models (VLMs) extend the reasoning capabilities of large language models (LLMs) to cross-modal settings, yet remain highly vulnerable to multimodal jailbreak attacks. Existing defenses predominantly rely on safety…

Artificial Intelligence · Computer Science 2026-04-14 Mengxuan Wang , Yuxin Chen , Gang Xu , Tao He , Hongjie Jiang , Ming Li

Multimodal large language models (MLLMs) face safety misalignment, where visual inputs enable harmful outputs. To address this, existing methods require explicit safety labels or contrastive data; yet, threat-related concepts are concrete…

Computer Vision and Pattern Recognition · Computer Science 2026-04-16 Qishun Yang , Shu Yang , Lijie Hu , Di Wang

Deploying large vision-language models (LVLMs) introduces a unique vulnerability: susceptibility to malicious attacks via visual inputs. However, existing defense methods suffer from two key limitations: (1) They solely focus on textual…

Cryptography and Security · Computer Science 2025-03-17 Shuyang Hao , Yiwei Wang , Bryan Hooi , Ming-Hsuan Yang , Jun Liu , Chengcheng Tang , Zi Huang , Yujun Cai

Large Vision-Language Models (LVLMs) demonstrate exceptional performance across multimodal tasks, yet remain vulnerable to jailbreak attacks that bypass built-in safety mechanisms to elicit restricted content generation. Existing black-box…

Computation and Language · Computer Science 2025-06-23 Lei Jiang , Zixun Zhang , Zizhou Wang , Xiaobing Sun , Zhen Li , Liangli Zhen , Xiaohua Xu

The emergence of Vision Language Models (VLMs) is a significant advancement in integrating computer vision with Large Language Models (LLMs) to produce detailed text descriptions based on visual inputs, yet it introduces new security…

Computer Vision and Pattern Recognition · Computer Science 2024-10-01 Weimin Lyu , Lu Pang , Tengfei Ma , Haibin Ling , Chao Chen

Vision Language Models (VLMs) hold great promise for streamlining labour-intensive medical imaging workflows, yet systematic security evaluations in clinical settings remain scarce. We introduce VSF--Med, an end-to-end vulnerability-scoring…

Computer Vision and Pattern Recognition · Computer Science 2025-07-02 Binesh Sadanandan , Vahid Behzadan

Vision-language models (VLMs) extend large language models (LLMs) with vision encoders, enabling text generation conditioned on both images and text. However, this multimodal integration expands the attack surface by exposing the model to…

Machine Learning · Computer Science 2026-02-03 Kaiyuan Cui , Yige Li , Yutao Wu , Xingjun Ma , Sarah Erfani , Christopher Leckie , Hanxun Huang

The growing misuse of Vision-Language Models (VLMs) has led providers to deploy multiple safeguards, including alignment tuning, system prompts, and content moderation. However, the real-world robustness of these defenses against…

Cryptography and Security · Computer Science 2025-11-21 Yijun Yang , Lichao Wang , Jianping Zhang , Chi Harold Liu , Lanqing Hong , Qiang Xu

Vision-Language Models (VLMs) extend the capabilities of Large Language Models (LLMs) by incorporating visual information, yet they remain vulnerable to jailbreak attacks, especially when processing noisy or corrupted images. Although…

Computer Vision and Pattern Recognition · Computer Science 2025-08-05 Jiawei Wang , Yushen Zuo , Yuanjun Chai , Zhendong Liu , Yicheng Fu , Yichun Feng , Kin-Man Lam

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

Vision-language models (VLMs) are increasingly applied to identify unsafe or inappropriate images due to their internal ethical standards and powerful reasoning abilities. However, it is still unclear whether they can recognize various…

Cryptography and Security · Computer Science 2025-07-16 Yiting Qu , Michael Backes , Yang Zhang

Augmenting Large Language Models (LLMs) with image-understanding capabilities has resulted in a boom of high-performing Vision-Language models (VLMs). While studying the alignment of LLMs to human values has received widespread attention,…

Computer Vision and Pattern Recognition · Computer Science 2024-05-08 Georgios Pantazopoulos , Amit Parekh , Malvina Nikandrou , Alessandro Suglia

The deployment of multimodal large language models (MLLMs) has brought forth a unique vulnerability: susceptibility to malicious attacks through visual inputs. This paper investigates the novel challenge of defending MLLMs against such…

Cryptography and Security · Computer Science 2024-06-18 Renjie Pi , Tianyang Han , Jianshu Zhang , Yueqi Xie , Rui Pan , Qing Lian , Hanze Dong , Jipeng Zhang , Tong Zhang

Large Language Models (LLMs) have transformed artificial intelligence by advancing natural language understanding and generation, enabling applications across fields beyond healthcare, software engineering, and conversational systems.…

Vision Language Models (VLMs) can produce unintended and harmful content when exposed to adversarial attacks, particularly because their vision capabilities create new vulnerabilities. Existing defenses, such as input preprocessing,…

Computer Vision and Pattern Recognition · Computer Science 2025-05-05 Han Wang , Gang Wang , Huan Zhang

The emergence of Vision-Language Models (VLMs) represents a significant advancement in integrating computer vision with Large Language Models (LLMs) to generate detailed text descriptions from visual inputs. Despite their growing…

Computer Vision and Pattern Recognition · Computer Science 2025-03-03 Weimin Lyu , Jiachen Yao , Saumya Gupta , Lu Pang , Tao Sun , Lingjie Yi , Lijie Hu , Haibin Ling , Chao Chen

Vision-language models (VLMs) demonstrate strong multimodal capabilities but have been found to be more susceptible to generating harmful content compared to their backbone large language models (LLMs). Our investigation reveals that the…

Machine Learning · Computer Science 2025-01-29 Qing Li , Jiahui Geng , Zongxiong Chen , Kun Song , Lei Ma , Fakhri Karray

Large Vision-Language Models (LVLMs) have transformed multi-modal understanding, excelling in tasks like image captioning and visual question answering by integrating visual and textual inputs. However, their robustness against adversarial…

Computer Vision and Pattern Recognition · Computer Science 2026-05-27 Xiang Fang , Wanlong Fang , Changshuo Wang