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As LLM agents transition from digital assistants to physical controllers in autonomous systems and robotics, they face an escalating threat from indirect prompt injection. By embedding adversarial instructions into the results of tool…

Artificial Intelligence · Computer Science 2026-01-09 Qiang Yu , Xinran Cheng , Chuanyi Liu

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

Large Language Models (LLMs) are increasingly being integrated into various applications. The functionalities of recent LLMs can be flexibly modulated via natural language prompts. This renders them susceptible to targeted adversarial…

Cryptography and Security · Computer Science 2023-05-08 Kai Greshake , Sahar Abdelnabi , Shailesh Mishra , Christoph Endres , Thorsten Holz , Mario Fritz

AI agents such as OpenClaw are increasingly deployed in local workflows with access to external tools. This creates indirect prompt-injection (IPI) risk: an agent may execute harmful instructions embedded in untrusted inputs such as email,…

Cryptography and Security · Computer Science 2026-05-26 Lei Zhao , Abhay Bhaskar , Edgar Dobriban

Web-browsing AI agents are increasingly deployed in enterprise settings under strict whitelists of approved domains, yet adversaries can still influence them by embedding hidden instructions in the HTML pages those domains serve. Existing…

Cryptography and Security · Computer Science 2026-05-13 Chia-Pei , Chen , Kentaroh Toyoda , Anita Lai , Alex Leung

LLM-based agents are increasingly deployed for complex tasks requiring planning, tool use, and interaction with external services. Their reliance on untrusted external content exposes them to indirect prompt injection (IPI), in which…

Machine Learning · Computer Science 2026-05-26 Zixuan Chen , Jiaxiang Chen , Li Luo , Ke Xu , Xiaoxiang Huang , Tanfeng Sun , Xinghao Jiang

The integration of Large Language Models (LLMs) with external sources is becoming increasingly common, with Retrieval-Augmented Generation (RAG) being a prominent example. However, this integration introduces vulnerabilities of Indirect…

Cryptography and Security · Computer Science 2026-01-07 Tongyu Wen , Chenglong Wang , Xiyuan Yang , Haoyu Tang , Yueqi Xie , Lingjuan Lyu , Zhicheng Dou , Fangzhao Wu

Recent work has embodied LLMs as agents, allowing them to access tools, perform actions, and interact with external content (e.g., emails or websites). However, external content introduces the risk of indirect prompt injection (IPI)…

Computation and Language · Computer Science 2024-08-06 Qiusi Zhan , Zhixiang Liang , Zifan Ying , Daniel Kang

Large language models (LLMs) are now routinely used to autonomously execute complex tasks, from natural language processing to dynamic workflows like web searches. The usage of tool-calling and Retrieval Augmented Generation (RAG) allows…

Cryptography and Security · Computer Science 2026-04-13 Dennis Rall , Bernhard Bauer , Mohit Mittal , Thomas Fraunholz

The integration of large language models with external content has enabled applications such as Microsoft Copilot but also introduced vulnerabilities to indirect prompt injection attacks. In these attacks, malicious instructions embedded…

Computation and Language · Computer Science 2025-01-28 Jingwei Yi , Yueqi Xie , Bin Zhu , Emre Kiciman , Guangzhong Sun , Xing Xie , Fangzhao Wu

As LLMs are increasingly integrated into systems that browse, retrieve, summarize, and act on web content, webpages have become an untrusted input vector for downstream model behavior. This enables site owners, contributors, and adversaries…

Cryptography and Security · Computer Science 2026-05-01 Soheil Khodayari , Xuenan Zhang , Bhupendra Acharya , Giancarlo Pellegrino

Recent studies demonstrate that Large Language Models (LLMs) are vulnerable to different prompt-based attacks, generating harmful content or sensitive information. Both closed-source and open-source LLMs are underinvestigated for these…

Cryptography and Security · Computer Science 2025-05-21 Jiawen Wang , Pritha Gupta , Ivan Habernal , Eyke Hüllermeier

The integration of external data services (e.g., Model Context Protocol, MCP) has made large language model-based agents increasingly powerful for complex task execution. However, this advancement introduces critical security…

Cryptography and Security · Computer Science 2026-02-25 Che Wang , Jiaming Zhang , Ziqi Zhang , Zijie Wang , Yinghui Wang , Jianbo Gao , Tao Wei , Zhong Chen , Wei Yang Bryan Lim

Modern coding agents integrated into IDEs orchestrate powerful tools and high-privilege system access, creating a high-stakes attack surface. Prior work on Indirect Prompt Injection (IPI) is mainly query-specific, requiring particular user…

Cryptography and Security · Computer Science 2026-01-15 Yuchong Xie , Zesen Liu , Mingyu Luo , Zhixiang Zhang , Kaikai Zhang , Yuanyuan Yuan , Zongjie Li , Ping Chen , Shuai Wang , Dongdong She

Large Language Models (LLMs) have been integrated into many applications (e.g., web agents) to perform more sophisticated tasks. However, LLM-empowered applications are vulnerable to Indirect Prompt Injection (IPI) attacks, where…

Cryptography and Security · Computer Science 2025-12-12 Yinan Zhong , Qianhao Miao , Yanjiao Chen , Jiangyi Deng , Yushi Cheng , Wenyuan Xu

The inference process of modern large language models (LLMs) demands prohibitive computational resources, rendering them infeasible for deployment on consumer-grade devices. To address this limitation, recent studies propose distributed LLM…

Cryptography and Security · Computer Science 2025-05-26 Xinjian Luo , Ting Yu , Xiaokui Xiao

Large Language Model (LLM) agents exhibit remarkable performance across diverse applications by using external tools to interact with environments. However, integrating external tools introduces security risks, such as indirect prompt…

Cryptography and Security · Computer Science 2025-03-05 Qiusi Zhan , Richard Fang , Henil Shalin Panchal , Daniel Kang

This report presents a real-world case study demonstrating how prompt injection can attack large language model platforms such as ChatGPT according to a proposed injection framework. By providing three real-world examples, we show how…

Cryptography and Security · Computer Science 2025-04-24 Xiangyu Chang , Guang Dai , Hao Di , Haishan Ye

Prompt injection attacks manipulate large language models (LLMs) by misleading them to deviate from the original input instructions and execute maliciously injected instructions, because of their instruction-following capabilities and…

Cryptography and Security · Computer Science 2025-10-07 Yulin Chen , Haoran Li , Yuan Sui , Yufei He , Yue Liu , Yangqiu Song , Bryan Hooi

Large Language Models (LLMs), renowned for their superior proficiency in language comprehension and generation, stimulate a vibrant ecosystem of applications around them. However, their extensive assimilation into various services…

Cryptography and Security · Computer Science 2025-12-30 Yi Liu , Gelei Deng , Yuekang Li , Kailong Wang , Zihao Wang , Xiaofeng Wang , Tianwei Zhang , Yepang Liu , Haoyu Wang , Yan Zheng , Leo Yu Zhang , Yang Liu
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