Search Results (1 CVEs found)

CVE Vendors Products Updated CVSS v3.1
CVE-2026-33252 2 Lfprojects, Modelcontextprotocol 2 Mcp Go Sdk, Go-sdk 2026-04-15 7.1 High
The Go MCP SDK used Go's standard encoding/json. Prior to version 1.4.1, the Go SDK's Streamable HTTP transport accepted browser-generated cross-site `POST` requests without validating the `Origin` header and without requiring `Content-Type: application/json`. In deployments without Authorization, especially stateless or sessionless configurations, this allows an arbitrary website to send MCP requests to a local server and potentially trigger tool execution. Version 1.4.1 contains a patch for the issue.