Safeguarding Vision-Language Models Against Patched Visual Prompt Injectors
On the map: Multimodal LLMs / vision-language models → MLLM jailbreaks and adversarial robustness
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Abstract (arXiv)
Large language models have become increasingly prominent, also signaling a shift towards multimodality as the next frontier in artificial intelligence, where their embeddings are harnessed as prompts to generate textual content. Vision-language models (VLMs) stand at the forefront of this advancement, offering innovative ways to combine visual and textual data for enhanced understanding and interaction. However, this integration also enlarges the attack surface. Patch-based adversarial attack is considered the most realistic threat model in physical vision applications, as demonstrated in many existing literature. In this paper, we propose to address patched visual prompt injection, where adversaries exploit adversarial patches to generate target content in VLMs. Our investigation reveals that patched adversarial prompts exhibit sensitivity to pixel-wise randomization, a trait that remains robust even against adaptive attacks designed to counteract such defenses. Leveraging this insight, we introduce SmoothVLM, a defense mechanism rooted in smoothing techniques, specifically tailored to protect VLMs from the threat of patched visual prompt injectors. Our framework significantly lowers the attack success rate to a range between 0% and 5.0% on two leading VLMs, while achieving around 67.3% to 95.0% context recovery of the benign images, demonstrating a balance between security and usability.
Key facts. Cited by 27 papers in the map (data through 14 Oct 2026). Placed in MLLM jailbreaks and adversarial robustness, one of 16 directions in Multimodal LLMs / vision-language models. Builds on 28 of its 34 references that are in the map. First posted on arXiv 17 May 2024.
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Other references · 27
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- 2022Constitutional AI: Harmlessness from AI Feedbackcited by 3,050
- 2023Not what you've signed up for: Compromising Real-World LLM-Integrated Applications with Indirect Prompt Injectioncited by 1,443
- 2023Jailbreaking Black Box Large Language Models in Twenty Queriescited by 1,420
- 2019Certified Adversarial Robustness via Randomized Smoothingcited by 1,340
- 2023Vision-Language Models for Vision Tasks: A Surveycited by 839
- 2014Deep Neural Networks are Easily Fooled: High Confidence Predictions for Unrecognizable Imagescited by 776
- 2023Prompt Injection attack against LLM-integrated Applicationscited by 605
- 2018Object Detection with Deep Learning: A Reviewcited by 528
15 more
- 2017Adversarial Patchcited by 517
- 2023SmoothLLM: Defending Large Language Models Against Jailbreaking Attackscited by 469
- 2023Pretraining Language Models with Human Preferencescited by 247
- 2023Better Diffusion Models Further Improve Adversarial Trainingcited by 208
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- 2024Optimization-based Prompt Injection Attack to LLM-as-a-Judgecited by 143
- 2023PaLI-3 Vision Language Models: Smaller, Faster, Strongercited by 126
- 2023Aligning Language Models with Preferences through f-divergence Minimizationcited by 120
- 2021PatchCleanser: Certifiably Robust Defense against Adversarial Patches for Any Image Classifiercited by 65
- 2023Robust Evaluation of Diffusion-Based Adversarial Purificationcited by 65
- 2022DensePure: Understanding Diffusion Models towards Adversarial Robustnesscited by 33
- 2021Towards Defending against Adversarial Examples via Attack-Invariant Featurescited by 25
- 2023DiffSmooth: Certifiably Robust Learning via Diffusion Models and Local Smoothingcited by 20
- 2023PatchCURE: Improving Certifiable Robustness, Model Utility, and Computation Efficiency of Adversarial Patch Defensescited by 11
- 2023Defending Against Physical Adversarial Patch Attacks on Infrared Human Detectioncited by 4
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Citing papers per year: 2024: 4; 2025: 14; 2026: 9.
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- 2025Safety at Scale: A Comprehensive Survey of Large Model and Agent Safetycited by 67
- 2025A Survey of Safety on Large Vision-Language Models: Attacks, Defenses and Evaluationscited by 67
- 2025VPI-Bench: Visual Prompt Injection Attacks for Computer-Use Agentscited by 45
- 2025GuardReasoner-VL: Safeguarding VLMs via Reinforced Reasoningcited by 42
- 2025Membership Inference Attacks Against Vision-Language Modelscited by 29
- 2024MirrorCheck: Efficient Adversarial Defense for Vision-Language Modelscited by 19
- 2025Poisoned-MRAG: Knowledge Poisoning Attacks to Multimodal Retrieval Augmented Generationcited by 12
- 2026Image-based Prompt Injection: Hijacking Multimodal LLMs through Visually Embedded Adversarial Instructionscited by 8
- 2024Zer0-Jack: A Memory-efficient Gradient-based Jailbreaking Method for Black-box Multi-modal Large Language Modelscited by 7
- 2024Defending LVLMs Against Vision Attacks through Partial-Perception Supervisioncited by 7
- 2025Seeing the Threat: Vulnerabilities in Vision-Language Models to Adversarial Attackcited by 5
- 2025SHIELD: Classifier-Guided Prompting for Robust and Safer LVLMscited by 5
15 more
- 2024Seeing is Deceiving: Exploitation of Visual Pathways in Multi-Modal Language Modelscited by 4
- 2026SnapGuard: Lightweight Prompt Injection Detection for Screenshot-Based Web Agentscited by 4
- 2025Safeguarding Vision-Language Models: Mitigating Vulnerabilities to Gaussian Noise in Perturbation-based Attackscited by 3
- 2026Concept-Based Dictionary Learning for Inference-Time Safety in Vision Language Action Modelscited by 3
- 2026WebAgentGuard: A Reasoning-Driven Guard Model for Detecting Prompt Injection Attacks in Web Agentscited by 3
- 2025SmoothGuard: Defending Multimodal Large Language Models with Noise Perturbation and Clustering Aggregationcited by 2
- 2025VSF-Med:A Vulnerability Scoring Framework for Medical Vision-Language Modelscited by 1
- 2025From Perception to Reasoning: Deep Thinking Empowers Multimodal Large Language Modelscited by 1
- 2025SGM: Safety Glasses for Multimodal Large Language Models via Neuron-Level Detoxificationcited by 1
- 2026Extended to Reality: Prompt Injection in 3D Environmentscited by 1
- 2026VALD: Multi-Stage Vision Attack Detection for Efficient LVLM Defensecited by 1
- 2025Advancing Vision-based Human Action Recognition: Exploring Vision-Language CLIP Model for Generalisation in Domain-Independent Taskscited by 0
- 2026A Systematic Study of Cross-Modal Typographic Attacks on Audio-Visual Reasoningcited by 0
- 2026A Cross-Modal Prompt Injection Attack against Large Vision-Language Models with Image-Only Perturbationcited by 0
- 2026Devil in the Lens: Analyzing and Defending Physical Prompt Injection Against Vision-Language Models on Wearable Devicescited by 0
- 2026Devil in the Lens: Analyzing and Defending Physical Prompt Injection Against Vision-Language Models on Wearable Devices11 Jul 2026
- 2026A Cross-Modal Prompt Injection Attack against Large Vision-Language Models with Image-Only Perturbation15 May 2026
- 2026SnapGuard: Lightweight Prompt Injection Detection for Screenshot-Based Web Agents28 Apr 2026
- 2026WebAgentGuard: A Reasoning-Driven Guard Model for Detecting Prompt Injection Attacks in Web Agents14 Apr 2026
- 2026A Systematic Study of Cross-Modal Typographic Attacks on Audio-Visual Reasoning5 Apr 2026
- 2026Image-based Prompt Injection: Hijacking Multimodal LLMs through Visually Embedded Adversarial Instructions4 Mar 2026
- 2026VALD: Multi-Stage Vision Attack Detection for Efficient LVLM Defense23 Feb 2026
- 2026Extended to Reality: Prompt Injection in 3D Environments6 Feb 2026
- 2026Concept-Based Dictionary Learning for Inference-Time Safety in Vision Language Action Models2 Feb 2026
- 2025SGM: Safety Glasses for Multimodal Large Language Models via Neuron-Level Detoxification17 Dec 2025
- 2025From Perception to Reasoning: Deep Thinking Empowers Multimodal Large Language Models17 Nov 2025
- 2025SmoothGuard: Defending Multimodal Large Language Models with Noise Perturbation and Clustering Aggregation29 Oct 2025
15 more
- 2025SHIELD: Classifier-Guided Prompting for Robust and Safer LVLMs15 Oct 2025
- 2025Advancing Vision-based Human Action Recognition: Exploring Vision-Language CLIP Model for Generalisation in Domain-Independent Tasks24 Jul 2025
- 2025VSF-Med:A Vulnerability Scoring Framework for Medical Vision-Language Models25 Jun 2025
- 2025VPI-Bench: Visual Prompt Injection Attacks for Computer-Use Agents3 Jun 2025
- 2025Seeing the Threat: Vulnerabilities in Vision-Language Models to Adversarial Attack28 May 2025
- 2025GuardReasoner-VL: Safeguarding VLMs via Reinforced Reasoning16 May 2025
- 2025Safeguarding Vision-Language Models: Mitigating Vulnerabilities to Gaussian Noise in Perturbation-based Attacks2 Apr 2025
- 2025Poisoned-MRAG: Knowledge Poisoning Attacks to Multimodal Retrieval Augmented Generation8 Mar 2025
- 2025A Survey of Safety on Large Vision-Language Models: Attacks, Defenses and Evaluations14 Feb 2025
- 2025Safety at Scale: A Comprehensive Survey of Large Model and Agent Safety2 Feb 2025
- 2025Membership Inference Attacks Against Vision-Language Models27 Jan 2025
- 2024Defending LVLMs Against Vision Attacks through Partial-Perception Supervision17 Dec 2024
- 2024Zer0-Jack: A Memory-efficient Gradient-based Jailbreaking Method for Black-box Multi-modal Large Language Models12 Nov 2024
- 2024Seeing is Deceiving: Exploitation of Visual Pathways in Multi-Modal Language Models7 Nov 2024
- 2024MirrorCheck: Efficient Adversarial Defense for Vision-Language Models13 Jun 2024
- 2025Safety at Scale: A Comprehensive Survey of Large Model and Agent Safetycited by 67
- 2025A Survey of Safety on Large Vision-Language Models: Attacks, Defenses and Evaluationscited by 67
- 2025Membership Inference Attacks Against Vision-Language Modelscited by 29
- 2024MirrorCheck: Efficient Adversarial Defense for Vision-Language Modelscited by 19
- 2026Image-based Prompt Injection: Hijacking Multimodal LLMs through Visually Embedded Adversarial Instructionscited by 8
- 2024Zer0-Jack: A Memory-efficient Gradient-based Jailbreaking Method for Black-box Multi-modal Large Language Modelscited by 7
- 2024Defending LVLMs Against Vision Attacks through Partial-Perception Supervisioncited by 7
- 2025Seeing the Threat: Vulnerabilities in Vision-Language Models to Adversarial Attackcited by 5
- 2024Seeing is Deceiving: Exploitation of Visual Pathways in Multi-Modal Language Modelscited by 4
- 2025Safeguarding Vision-Language Models: Mitigating Vulnerabilities to Gaussian Noise in Perturbation-based Attackscited by 3
- 2025SmoothGuard: Defending Multimodal Large Language Models with Noise Perturbation and Clustering Aggregationcited by 2
- 2025VSF-Med:A Vulnerability Scoring Framework for Medical Vision-Language Modelscited by 1
12 most cited of 16 All 16 (JSON)
- 2026A Cross-Modal Prompt Injection Attack against Large Vision-Language Models with Image-Only Perturbation15 May 2026
- 2026Image-based Prompt Injection: Hijacking Multimodal LLMs through Visually Embedded Adversarial Instructions4 Mar 2026
- 2026VALD: Multi-Stage Vision Attack Detection for Efficient LVLM Defense23 Feb 2026
- 2026Extended to Reality: Prompt Injection in 3D Environments6 Feb 2026
- 2025SGM: Safety Glasses for Multimodal Large Language Models via Neuron-Level Detoxification17 Dec 2025
- 2025SmoothGuard: Defending Multimodal Large Language Models with Noise Perturbation and Clustering Aggregation29 Oct 2025
- 2025VSF-Med:A Vulnerability Scoring Framework for Medical Vision-Language Models25 Jun 2025
- 2025Seeing the Threat: Vulnerabilities in Vision-Language Models to Adversarial Attack28 May 2025
- 2025Safeguarding Vision-Language Models: Mitigating Vulnerabilities to Gaussian Noise in Perturbation-based Attacks2 Apr 2025
- 2025A Survey of Safety on Large Vision-Language Models: Attacks, Defenses and Evaluations14 Feb 2025
- 2025Safety at Scale: A Comprehensive Survey of Large Model and Agent Safety2 Feb 2025
- 2025Membership Inference Attacks Against Vision-Language Models27 Jan 2025
12 newest of 16 All 16 (JSON)
- 2025GuardReasoner-VL: Safeguarding VLMs via Reinforced Reasoningcited by 42
- 2025Poisoned-MRAG: Knowledge Poisoning Attacks to Multimodal Retrieval Augmented Generationcited by 12
- 2025SHIELD: Classifier-Guided Prompting for Robust and Safer LVLMscited by 5
- 2025From Perception to Reasoning: Deep Thinking Empowers Multimodal Large Language Modelscited by 1
- 2026A Systematic Study of Cross-Modal Typographic Attacks on Audio-Visual Reasoningcited by 0
- 2026A Systematic Study of Cross-Modal Typographic Attacks on Audio-Visual Reasoning5 Apr 2026
- 2025From Perception to Reasoning: Deep Thinking Empowers Multimodal Large Language Models17 Nov 2025
- 2025SHIELD: Classifier-Guided Prompting for Robust and Safer LVLMs15 Oct 2025
- 2025GuardReasoner-VL: Safeguarding VLMs via Reinforced Reasoning16 May 2025
- 2025Poisoned-MRAG: Knowledge Poisoning Attacks to Multimodal Retrieval Augmented Generation8 Mar 2025
Similar, not cited
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- 2024Patch is Enough: Naturalistic Adversarial Patch against Vision-Language Pre-training Models
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- 2024Towards Adversarially Robust Vision-Language Models: Insights from Design Choices and Prompt Formatting Techniques
- 2025Attention-Guided Patch-Wise Sparse Adversarial Attacks on Vision-Language-Action Models
- 2025Model-agnostic Adversarial Attack and Defense for Vision-Language-Action Models
- 2026Detect and Suppress: A Mechanistic Defense against Adversarial Patches in VLA Models
- 2025Transferable Adversarial Attacks on Black-Box Vision-Language Models
- 2024One Prompt Word is Enough to Boost Adversarial Robustness for Pre-trained Vision-Language Models