https://vulnerability.circl.lu/rss/recent/all/10 Most recent entries from all 2026-10-04T00:39:09.331770+00:00 Vulnerability-Lookup info@circl.lu python-feedgen Contains only the most 10 recent entries. https://vulnerability.circl.lu/vuln/cve-2026-59950 CVE-2026-59950 — MCP Python SDK: WebSocket server transport does not support Host/Origin validation 2026-10-04T00:39:09.333598+00:00

Affected: modelcontextprotocol python-sdk

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.