Security Advisory

CVE-2026-52870

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-15 20:07:53

Last updated 2026-07-16 13:01:40

Assigner GitHub_M

CVSS score 7.6

State PUBLISHED

Description

The MCP Python SDK, called mcp on PyPI, is a Python implementation of the Model Context Protocol (MCP). From 1.23.0 until 1.27.2, default handlers installed by server.experimental.enable_tasks() for tasks/list, tasks/get, tasks/result, and tasks/cancel operate only on task identifiers without recording the session that created each task, allowing any connected client to enumerate, read results from, consume messages for, or cancel other clients' tasks. This issue is fixed in version 1.27.2.

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