CVE-2025-53365

The MCP Python SDK, called `mcp` on PyPI, is a Python implementation of the Model Context Protocol (MCP). Prior to version 1.10.0, if a client deliberately triggers an exception after establishing a streamable HTTP session, this can lead to an uncaught ClosedResourceError on the server side, causing the server to crash and requiring a restart to restore service. Impact may vary depending on the deployment conditions, and presence of infrastructure-level resilience measures. Version 1.10.0 contains a patch for the issue.

CVSS

No CVSS.

References

Link	Resource
https://github.com/modelcontextprotocol/python-sdk/commit/7b420656de48cfdb90b39eb582e60b6d55c2f891
https://github.com/modelcontextprotocol/python-sdk/pull/967
https://github.com/modelcontextprotocol/python-sdk/security/advisories/GHSA-j975-95f5-7wqh

Configurations

No configuration.

History

08 Jul 2025, 16:18

Type	Values Removed	Values Added
Summary		(es) MCP Python SDK, llamado «mcp» en PyPI, es una implementación en Python del Protocolo de Contexto de Modelo (MCP). Antes de la versión 1.10.0, si un cliente activaba deliberadamente una excepción tras establecer una sesión HTTP con transmisión, esto podía generar un error ClosedResourceError no detectado en el servidor, lo que provocaba un fallo del servidor y requería un reinicio para restablecer el servicio. El impacto puede variar según las condiciones de implementación y la presencia de medidas de resiliencia a nivel de infraestructura. La versión 1.10.0 incluye un parche para este problema.

04 Jul 2025, 22:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-07-04 22:15

Updated : 2025-07-08 16:18

NVD link : CVE-2025-53365

Mitre link : CVE-2025-53365

CVE.ORG link : CVE-2025-53365

JSON object : View

Products Affected

No product.

CWE

CWE-248

Uncaught Exception

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