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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) 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) represents a significant advancement in AI-tool integration, enabling seamless communication between AI agents and external services. However, this connectivity introduces novel attack vectors that remain…

Cryptography and Security · Computer Science 2025-07-29 Nicola Croce , Tobin South

The Model Context Protocol (MCP) introduces a structurally distinct attack surface that existing threat frameworks, designed for traditional software systems or generic LLM deployments, do not adequately cover. This paper presents MCP-38, a…

Cryptography and Security · Computer Science 2026-03-20 Yi Ting Shen , Kentaroh Toyoda , Alex Leung

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) 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) has emerged as the de facto standard for connecting Large Language Models (LLMs) to external data and tools, effectively functioning as the "USB-C for Agentic AI." While this decoupling of context and…

Cryptography and Security · Computer Science 2025-12-16 Shiva Gaire , Srijan Gyawali , Saroj Mishra , Suman Niroula , Dilip Thakur , Umesh Yadav

The Model Context Protocol (MCP) plays a crucial role in extending the capabilities of Large Language Models (LLMs) by enabling integration with external tools and data sources. However, the standard MCP specification presents significant…

Cryptography and Security · Computer Science 2025-06-03 Manish Bhatt , Vineeth Sai Narajala , Idan Habler

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

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 rapid proliferation of Model Context Protocol (MCP)-based agentic systems has introduced a new category of security threats that existing frameworks are inadequately equipped to address. We present MCPThreatHive, an open-source platform…

Cryptography and Security · Computer Science 2026-04-16 Yi Ting Shen , Kentaroh Toyoda , Alex Leung

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

Model Context Protocol (MCP) servers have rapidly emerged over the past year as a widely adopted way to enable Large Language Model (LLM) agents to access dynamic, real-world tools. As MCP servers proliferate and become easy to adopt via…

Cryptography and Security · Computer Science 2026-03-12 Pratyay Kumar , Miguel Antonio Guirao Aguilera , Srikathyayani Srikanteswara , Satyajayant Misra , Abu Saleh Md Tayeen

The Model Context Protocol (MCP) has emerged as a widely adopted mechanism for connecting large language models to external tools and resources. While MCP promises seamless extensibility and rich integrations, it also introduces a…

Cryptography and Security · Computer Science 2025-07-10 Zhihao Li , Kun Li , Boyang Ma , Minghui Xu , Yue Zhang , Xiuzhen Cheng

The Model Context Protocol (MCP) standardizes how a large-language-model (LLM) agent and an external tool server exchange messages, but not trust: a host reads a server's self-declared tool list and dispatches calls, with no notion of which…

Cryptography and Security · Computer Science 2026-05-26 Alfredo Metere

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

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

The Model Context Protocol (MCP) standardizes tool use for LLM-based agents and enable third-party servers. This openness introduces a security misalignment: agents implicitly trust tools exposed by potentially untrusted MCP servers.…

Cryptography and Security · Computer Science 2026-02-25 Zhenhong Zhou , Yuanhe Zhang , Hongwei Cai , Moayad Aloqaily , Ouns Bouachir , Linsey Pang , Prakhar Mehrotra , Kun Wang , Qingsong Wen

This paper identifies and analyzes a novel vulnerability class in Model Context Protocol (MCP) based agent systems. The attack chain describes and demonstrates how benign, individually authorized tasks can be orchestrated to produce harmful…

Cryptography and Security · Computer Science 2025-08-28 David Noever

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