modelcontextprotocol Python Sdk Vulnerabilities

Modelcontextprotocol Python-sdk vulnerabilities.

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14 October 2026

Memory Exhaustion Vulnerability in Model Context Protocol Python SDK
CVE-2026-109527
ModelcontextprotocolPython-sdk7.5HIGH
Memory Retention Vulnerability in MCP Python SDK Affecting FastMCP and MCPServer
CVE-2026-59951
ModelcontextprotocolPython-sdk6.9MEDIUM

15 July 2026

WebSocket Handshake Vulnerability in MCP Python SDK by Model Context Protocol
CVE-2026-59950
ModelcontextprotocolPython-sdk7.6HIGH
Improper Task Handling in Python SDK by Model Context Protocol
CVE-2026-52870
ModelcontextprotocolPython-sdk7.6HIGH
Vulnerability in MCP Python SDK Affects JSON-RPC Message Security
CVE-2026-52869
ModelcontextprotocolPython-sdk7.1HIGH

2 December 2025

DNS Rebinding Vulnerability in MCP Python SDK by Model Context Protocol
CVE-2025-66416
ModelcontextprotocolPython-sdk7.6HIGH

4 July 2025