7.6Alta
CVE-2026-59950MCP Python SDK: WebSocket server transport does not support Host/Origin validation
Descripción
The MCP Python SDK, called mcp on PyPI, is a Python implementation of the Model Context Protocol (MCP). Prior to 1.28.1, the deprecated mcp.server.websocket.websocket_server transport accepted WebSocket handshakes without applying Host or Origin header validation, leaving no SDK-level way to restrict which origins could connect to applications that exposed that transport. This issue is fixed in version 1.28.1.
Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.
Productos y versiones afectados
| Fabricante | Producto | Versiones | |
|---|---|---|---|
| lfprojects | mcp python sdk | < 1.28.1 | |
| modelcontextprotocol | python-sdk | < 1.28.1 |
Referencias y parches
- https://github.com/modelcontextprotocol/python-sdk/security/advisories/GHSA-vj7q-gjh5-988w Vendor Advisory
- https://github.com/modelcontextprotocol/python-sdk/pull/2992 Issue TrackingPatch
- https://github.com/modelcontextprotocol/python-sdk/commit/777b8d06710c140e3606b0d4598e2aa48546c266 Patch
- https://github.com/modelcontextprotocol/python-sdk/releases/tag/v1.28.1 Release Notes
Coincidencias CPE (NVD) (1)
cpe:2.3:a:lfprojects:mcp_python_sdk:*:*:*:*:*:*:*:*< 1.28.1