CVE-2026-81095
MediumCVSS 6.8Exploitation Probability (EPSS)
Low risk5th percentile - higher than 5% of all known CVEs
Summary
pg-aiguide started its MCP HTTP transport without enabling the host allow-list provided by the underlying SDK. src/httpServer.ts called the shared httpServerFactory helper and never set the DNS-rebinding-protection option, so the transport accepted requests regardless of the host name. A page in a browser could point a controlled name at the server's address and drive the locally reachable MCP server through the visitor's browser. The protection was already available in the packaged transport and simply not turned on, so updating the dependency alone would not have closed it. Version 0.5.1 passes the option explicitly.
Risk Assessment
An attacker can use a victim's browser to remotely drive the local MCP server, potentially leading to unauthorized access to data and actions in the user's context.
Recommendation
Upgrade pg-aiguide to version 0.5.1 or later, which explicitly enables the host allow-list in the MCP HTTP transport.
Original NVD description (English source)
pg-aiguide started its MCP HTTP transport without enabling the host allow-list the underlying SDK provides. src/httpServer.ts called the shared httpServerFactory helper and never set the DNS-rebinding-protection option, so the transport accepted a request whatever host it named. A page in a browser could therefore point a name it controlled at the address the server was bound to and drive the locally reachable MCP server through the visitor's browser. The protection was already available in the packaged transport and simply not turned on, so updating the dependency alone would not have closed it. Version 0.5.1 passes the option explicitly.