A security vulnerability has been identified in Solo.io's agentgateway where a filesystem MCP server, even when scoped to a specific directory, can still access sensitive files like .env if an agent requests them by path. This occurs because the built-in mcpAuthorization policy, which uses CEL rules, evaluates before tool arguments are populated, preventing path-based denials. To address this, a custom guardrail using ExtMCP, an external gRPC service, can be implemented to inspect and filter file access requests before they reach the filesystem server, effectively blocking access to sensitive paths. AI
IMPACT This vulnerability highlights the need for robust security measures in agent frameworks to prevent unauthorized access to sensitive data.
RANK_REASON The item describes a specific security vulnerability and a custom solution for a particular software product, rather than a new release or major industry event.
AI-generated summary · Google Gemini · from 1 sources. How we write summaries →
