[CVE-2026-52870] The MCP Python SDK, called mcp on PyPI, is a Python implementation of the Model Context Protocol (MC…

Descripción técnica

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.

Puntuación CVSS

Score: 7.6/10 — Severidad: HIGH — Estado NIST: Analyzed

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L

Productos afectados

Mcp python sdk — Lfprojects

Debilidades (CWE)

CWE-862

Fuente oficial

Publicado en NIST NVD.