Executive Summary
MCP servers can expose enterprise secrets through plaintext config files, over-permissioned access and prompt injection, often before security teams know they are running.
What Happened
MCP servers can expose enterprise secrets through plaintext configuration files, over-permissioned access and prompt injection, often before security teams even know the server is running. As more organizations adopt AI agents into their systems, that exposure can silently become a major gap in MCP server security. The Model Context Protocol (MCP) allows AI agents to reach the tools and data,
Vulnerability / Attack Technique
Secret exposure through MCP servers
Technical Mechanism
MCP servers store credentials in plaintext configs and hold broad access, which prompt injection can then misuse.
AI Security Category
LLM02:2025 Sensitive Information Disclosure
Part of the MCP Security topic.
Relevant Frameworks
RealGround Analysis
Shadow MCP servers are a new place for secrets to sprawl. RealGround analysis: inventory MCP servers and move their credentials into a secrets manager.
Recommended Controls
- Inventory MCP servers in use
- Move MCP credentials out of plaintext configs
- Scope MCP server permissions to the minimum
Related RealGround Service
Secure AI Agent Build · or start with the free AI Agent Security Scanner.
Sources
thehackernews.com: https://thehackernews.com/2026/08/how-mcp-servers-can-expose-enterprise.html
Summary and analysis written by RealGround from the source above; last updated 2026-10-18.