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The Model Context Protocol (MCP) has emerged as a standard for connecting large language models (LLMs) with external tools. However, this MCP ecosystem introduces new security risks across hosts, servers, and registries. In this paper, we…

Cryptography and Security · Computer Science 2026-04-29 Xiaofan Li , Xing Gao

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

Model Context Protocol (MCP) is increasingly adopted for tool-integrated LLM agents, but its multi-layer design and third-party server ecosystem expand risks across tool metadata, untrusted outputs, cross-tool flows, multimodal inputs, and…

Cryptography and Security · Computer Science 2026-04-24 Run Hao , Zhuoran Tan

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

Although Foundation Models (FMs), such as GPT-4, are increasingly used in domains like finance and software engineering, reliance on textual interfaces limits these models' real-world interaction. To address this, FM providers introduced a…

Software Engineering · Computer Science 2026-04-14 Mohammed Mehedi Hasan , Hao Li , Emad Fallahzadeh , Gopi Krishnan Rajbahadur , Bram Adams , Ahmed E. Hassan

Large Language Models (LLMs) increasingly rely on external tools to perform complex, realistic tasks, yet their ability to utilize the rapidly expanding Model Contextual Protocol (MCP) ecosystem remains limited. Existing MCP research covers…

Artificial Intelligence · Computer Science 2026-04-17 Wenhao Wang , Peizhi Niu , Zhao Xu , Zhaoyu Chen , Jian Du , Yaxin Du , Xianghe Pang , Keduan Huang , Yanfeng Wang , Qiang Yan , Siheng Chen

The Model Context Protocol (MCP) is an emerging open standard that defines a unified, bi-directional communication and dynamic discovery protocol between AI models and external tools or resources, aiming to enhance interoperability and…

Cryptography and Security · Computer Science 2025-10-08 Xinyi Hou , Yanjie Zhao , Shenao Wang , Haoyu Wang

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

Model Context Protocol (MCP) servers enable AI applications to connect to external systems in a plug-and-play manner, but their rapid proliferation also introduces severe security risks. Unlike mature software ecosystems with rigorous…

Cryptography and Security · Computer Science 2025-09-30 Weibo Zhao , Jiahao Liu , Bonan Ruan , Shaofei Li , Zhenkai Liang

The Model Context Protocol (MCP) has emerged as a standardized interface enabling seamless integration between Large Language Models (LLMs) and external data sources and tools. While MCP significantly reduces development complexity and…

Cryptography and Security · Computer Science 2025-10-29 Bin Wang , Zexin Liu , Hao Yu , Ao Yang , Yenan Huang , Jing Guo , Huangsheng Cheng , Hui Li , Huiyu Wu

The Model Context Protocol (MCP) is rapidly emerging as the middleware for LLM-based applications, offering a standardized interface for tool integration. However, its built-in security mechanisms are minimal: while schemas and declarations…

Cryptography and Security · Computer Science 2025-12-04 Biwei Yan , Yue Zhang , Minghui Xu , Hao Wu , Yechao Zhang , Kun Li , Guoming Zhang , Xiuzhen Cheng

The Model Context Protocol (MCP) enables large language models to invoke external tools through natural-language descriptions, forming the foundation of many AI agent applications. However, MCP does not enforce consistency between…

Cryptography and Security · Computer Science 2026-02-04 Zhihao Li , Boyang Ma , Xuelong Dai , Minghui Xu , Yue Zhang , Biwei Yan , Kun Li

Large language models (LLMs) are evolving into agentic systems that reason, plan, and operate external tools. The Model Context Protocol (MCP) is a key enabler of this transition, offering a standardized interface for connecting LLMs with…

Computation and Language · Computer Science 2026-03-06 Xuanjun Zong , Zhiqi Shen , Lei Wang , Yunshi Lan , Chao Yang

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

The Model Context Protocol (MCP) is a new and emerging technology that extends the functionality of large language models, improving workflows but also exposing users to a new attack surface. Several studies have highlighted related…

Cryptography and Security · Computer Science 2026-04-14 Tobias Mattsson , Samuel Nyberg , Anton Borg , Ricardo Britto

The Model Context Protocol (MCP) is emerging as a common interface connecting large language models (LLMs) with external services. Remote deployments are becoming increasingly important as agents connect to user-linked online services, such…

Cryptography and Security · Computer Science 2026-05-22 Huijun Zhou , Xiaohan Zhang , Haozhe Zhang , Haoyang Zhang , Mi Zhang , Min Yang

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 Model Context Protocol (MCP) replaces static, developer-controlled API integrations with more dynamic, user-driven agent systems, which also introduces new security risks. As MCP adoption grows across community servers and major…

Cryptography and Security · Computer Science 2025-11-27 Herman Errico , Jiquan Ngiam , Shanita Sojan

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) 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
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