sigma-ai

AgentShield Sigma Rules What is This Repository? This repository contains detection rules that help identify when an AI agent is being attacked or manipulated. Think of it as a library of "threat signatures" -- each rule describes a pattern that, when matched against an agent's log data, signals...

ai-tool-poisoning-guard

ai-tool-poisoning-guard Minimum security-baseline rule for Claude Code, Codex, and Cursor. This free rule closes a real gap in each tool's built-in review. Full ruleset + implementation guide: Gumroad link — coming soon. Your AI coding assistant reviews code. It doesn't review the sentence that...

UAP-protocol

██╗ ██╗ █████╗ ██████╗ ██║ ██║██╔══██╗██╔══██╗ ██║ ██║███████║██████╔╝ ██║ ██║██╔══██║██╔═══╝ ╚██████╔╝██║ ██║██║ ╚═════╝ ╚═╝ ╚═╝╚═╝ Universal Agent Protocol A unified, security-first wire protocol for tool access, agent coordination, and structured RPC. Built to close CVE-2025-49596 and the clas...

mcp-doorman

mcp-doorman The security gateway for MCP servers — every tool call gets checked at the door. CI npm License: Apache-2.0 PRs welcome mcp-doorman is a drop-in proxy that sits between your AI agent Claude Desktop, Claude Code, Cursor, VS Code, any MCP client and the MCP servers it uses. One command,...

Characterizing Network Centralization and Observability in the Remote MCP Ecosystem

The Model Context Protocol MCP has emerged as the dominant interface for connecting autonomous agents to external data sources and execution environments. The ecosystem's transition from local process execution to remote Streamable HTTP deployments introduces unmeasured architectural and security...

leash-poc

leash-poc: MCP tool-poisoning, contained by an independent pol...

Securing AI agents: When AI tools move from reading to acting

In this article 1. From reading to acting 2. Attack pattern: MCP tool poisoning in a finance workflow 3. Mitigation and protection guidance 4. References 5. Learn more As enterprise deployments mature, some enterprise AI agents are shifting from reading content to taking action. In this post,...

mcp-tool-poisoning-poc

mcp-tool-poisoning — Educational PoC Demonstrates the Too...

Model Context Protocol Threat Modeling and Analyzing Vulnerabilities to Prompt Injection with Tool Poisoning

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 significant security vulnerabilities, particularly on the client...

CVE-2026-25805 Zed does not show Parameter Values for MCP Tool Calls. Users cannot detect tool poisoning.

Zed is a multiplayer code editor. Prior to 0.219.4, Zed does not show with which parameters a tool is being invoked, when asking for allowance. Further it does not show after the tool was being invoked, which parameters were used. Thus, maybe unwanted or even malicious values could be used withou...

mcp-exploit-demo-master

!Imagehttps://github.com/user-attachments/assets/2180e098-091...

Securing the Model Context Protocol: Defending LLMs against Tool Poisoning and Adversarial Attacks

The Model Context Protocol MCP enables Large Language Models to integrate external tools through structured descriptors, increasing autonomy in decision-making, task execution, and multi-agent workflows. However, this autonomy creates a largely overlooked security gap. Existing defenses focus on...

Automatic Red Teaming LLM-Based Agents with Model Context Protocol Tools

The remarkable capability of large language models LLMs has led to the wide application of LLM-based agents in various domains. To standardize interactions between LLM-based agents and their environments, model context protocol MCP tools have become the de facto standard and are now widely...

MCP Server Tool Poisoning

Model Context Protocol MCP Server Tool Poisoning occurs when malicious actors manipulate tool configurations or metadata on a malicious MCP server. This can lead to the execution of unauthorized commands, data corruption, or the deployment of malicious tools. Such vulnerabilities are particularly...

Model Context Protocol (MCP) at First Glance: Studying the Security and Maintainability of MCP Servers

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 tool calling-triggering a proliferation of frameworks with...

Beyond the Protocol: Unveiling Attack Vectors in the Model Context Protocol Ecosystem

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 already been developed and deployed. However, the client-server...

Researchers Demonstrate How MCP Prompt Injection Can Be Used for Both Attack and Defense

As the field of artificial intelligence AI continues to evolve at a rapid pace, fresh research has found how techniques that render the Model Context Protocol MCP susceptible to prompt injection attacks could be used to develop security tooling or identify malicious tools, according to a new repo...