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To standardize interactions between LLM-based agents and their environments, the Model Context Protocol (MCP) was proposed and has since been widely adopted. However, integrating external tools expands the attack surface, exposing agents to…

Cryptography and Security · Computer Science 2026-01-13 Ruiqi Li , Zhiqiang Wang , Yunhao Yao , Xiang-Yang Li

The Model Context Protocol (MCP) enables large language models (LLMs) to dynamically discover and invoke third-party tools, significantly expanding agent capabilities while introducing a distinct security landscape. Unlike prompt-only…

Cryptography and Security · Computer Science 2026-04-10 Mehrdad Rostamzadeh , Sidhant Narula , Nahom Birhan , Mohammad Ghasemigol , Daniel Takabi

The Model Context Protocol (MCP) enables Large Language Models (LLMs) to interact with external tools via tool descriptors, thereby extending their capabilities for task execution, autonomous decision-making, and multi-agent coordination.…

Cryptography and Security · Computer Science 2026-05-22 Saeid Jamshidi , Arghavan Moradi Dakhel , Kawser Wazed Nafi , Foutse Khomh

Large language models(LLMs) are increasingly integrated with external systems through the Model Context Protocol(MCP),which standardizes tool invocation and has rapidly become a backbone for LLM-powered applications. While this paradigm…

Cryptography and Security · Computer Science 2026-05-04 Shuli Zhao , Qinsheng Hou , Zihan Zhan , Yanhao Wang , Yuchong Xie , Yu Guo , Libo Chen , Shenghong Li , Zhi Xue

Large Language Models (LLMs) are increasingly equipped with capabilities of real-time web search and integrated with protocols like Model Context Protocol (MCP). This extension could introduce new security vulnerabilities. We present a…

Cryptography and Security · Computer Science 2025-05-23 Junjie Xiong , Changjia Zhu , Shuhang Lin , Chong Zhang , Yongfeng Zhang , Yao Liu , Lingyao Li

As Model Context Protocol (MCP) introduces an easy-to-use ecosystem for users and developers, it also brings underexplored safety risks. Its decentralized architecture, which separates clients and servers, poses unique challenges for…

Computation and Language · Computer Science 2025-09-30 Huihao Jing , Haoran Li , Wenbin Hu , Qi Hu , Heli Xu , Tianshu Chu , Peizhao Hu , Yangqiu Song

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

The Model Context Protocol (MCP) has rapidly emerged as a universal standard for connecting AI assistants to external tools and data sources. While MCP simplifies integration between AI applications and various services, it introduces…

Cryptography and Security · Computer Science 2026-03-25 Charoes Huang , Xin Huang , Ngoc Phu Tran , Amin Milani Fard

While Large Language Models (LLMs) display versatile functionality, they continue to generate harmful, biased, and toxic content, as demonstrated by the prevalence of human-designed jailbreaks. In this work, we present Tree of Attacks with…

Machine Learning · Computer Science 2024-11-01 Anay Mehrotra , Manolis Zampetakis , Paul Kassianik , Blaine Nelson , Hyrum Anderson , Yaron Singer , Amin Karbasi

The Model Context Protocol (MCP) is an emerging standard designed to enable seamless interaction between Large Language Model (LLM) applications and external tools or resources. Within a short period, thousands of MCP services have been…

Cryptography and Security · Computer Science 2025-09-16 Hao Song , Yiming Shen , Wenxuan Luo , Leixin Guo , Ting Chen , Jiashui Wang , Beibei Li , Xiaosong Zhang , Jiachi Chen

Model Context Protocol (MCP) is a rapidly adopted standard for defining and invoking external tools in LLM applications. The multi-layered architecture of MCP introduces new attack surfaces such as tool poisoning, in addition to traditional…

Cryptography and Security · Computer Science 2026-04-21 İpek Abasıkeleş Turgut , Edip Gümüş

While Large Language Models (LLMs) have achieved remarkable performance, they remain vulnerable to jailbreak. The integration of Large Language Models (LLMs) with external tools via protocols such as the Model Context Protocol (MCP)…

Cryptography and Security · Computer Science 2026-01-09 Wenpeng Xing , Zhonghao Qi , Yupeng Qin , Yilin Li , Caini Chang , Jiahui Yu , Changting Lin , Zhenzhen Xie , Meng Han

Model Context Protocol (MCP) has emerged as a standard interface for connecting LLM agents to external tools. Because MCP servers expose privileged operations such as shell execution, network access, and file-system manipulation to…

Cryptography and Security · Computer Science 2026-05-21 Pengyu Sun , Qishu Jin , Enhao Huang , Zifeng Kang , Xin Liu , Dakun Shen , Song Li

The Model Context Protocol (MCP) standardizes how large language model (LLM) agents discover, describe, and call external tools. While MCP unlocks broad interoperability, it also enlarges the attack surface by making tools first-class,…

Cryptography and Security · Computer Science 2026-03-25 Dongsen Zhang , Zekun Li , Xu Luo , Xuannan Liu , Peipei Li , Wenjun Xu

Vision-Language Models (VLMs), such as CLIP, have achieved impressive zero-shot recognition performance but remain highly susceptible to adversarial perturbations, posing significant risks in safety-critical scenarios. Previous…

Computer Vision and Pattern Recognition · Computer Science 2026-03-24 Zhiwei Li , Yitian Pang , Weining Wang , Zhenan Sun , Qi Li

By providing a standardized interface for LLM agents to interact with external tools, the Model Context Protocol (MCP) is quickly becoming a cornerstone of the modern autonomous agent ecosystem. However, it creates novel attack surfaces due…

Cryptography and Security · Computer Science 2025-08-22 Zhiqiang Wang , Yichao Gao , Yanting Wang , Suyuan Liu , Haifeng Sun , Haoran Cheng , Guanquan Shi , Haohua Du , Xiangyang Li

We present a novel class of jailbreak adversarial attacks on LLMs, termed Task-in-Prompt (TIP) attacks. Our approach embeds sequence-to-sequence tasks (e.g., cipher decoding, riddles, code execution) into the model's prompt to indirectly…

Cryptography and Security · Computer Science 2025-06-03 Sergey Berezin , Reza Farahbakhsh , Noel Crespi

The Model Context Protocol (MCP) has emerged as a de facto standard for integrating Large Language Models with external tools, yet no formal security analysis of the protocol specification exists. We present the first rigorous security…

Cryptography and Security · Computer Science 2026-01-27 Narek Maloyan , Dmitry Namiot

The Model Context Protocol (MCP) has emerged as a universal standard that enables AI agents to seamlessly connect with external tools, significantly enhancing their functionality. However, while MCP brings notable benefits, it also…

Cryptography and Security · Computer Science 2026-05-26 Yongjian Guo , Puzhuo Liu , Wanlun Ma , Zehang Deng , Xiaogang Zhu , Peng Di , Xi Xiao , Sheng Wen

The proliferation of autonomous agents powered by large language models (LLMs) has revolutionized popular business applications dealing with tabular data, i.e., tabular agents. Although LLMs are observed to be vulnerable against prompt…

Cryptography and Security · Computer Science 2025-04-15 Yang Feng , Xudong Pan
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