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.
References
Configurations
History
17 Jul 2026, 18:07
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/modelcontextprotocol/python-sdk/commit/777b8d06710c140e3606b0d4598e2aa48546c266 - Patch | |
| References | () https://github.com/modelcontextprotocol/python-sdk/pull/2992 - Issue Tracking, Patch | |
| References | () https://github.com/modelcontextprotocol/python-sdk/releases/tag/v1.28.1 - Release Notes | |
| References | () https://github.com/modelcontextprotocol/python-sdk/security/advisories/GHSA-vj7q-gjh5-988w - Vendor Advisory | |
| CPE | cpe:2.3:a:lfprojects:mcp_python_sdk:*:*:*:*:*:*:*:* | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 8.1 |
| First Time |
Lfprojects
Lfprojects mcp Python Sdk |
15 Jul 2026, 21:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-07-15 21:16
Updated : 2026-07-17 18:07
NVD link : CVE-2026-59950
Mitre link : CVE-2026-59950
CVE.ORG link : CVE-2026-59950
JSON object : View
Products Affected
lfprojects
- mcp_python_sdk