Vulnerability Monitor

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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.

Published

2025-07-04T22:15:22.117

Last Modified

2025-07-08T16:18:53.607

Status

Awaiting Analysis

Source

[email protected]

Severity

Weaknesses

Type: Primary
CWE-248

Affected Vendors & Products

References

https://github.com/modelcontextprotocol/python-sdk/commit/7b420656de48cfdb90b39eb582e60b6d55c2f891 ([email protected])
https://github.com/modelcontextprotocol/python-sdk/pull/967 ([email protected])
https://github.com/modelcontextprotocol/python-sdk/security/advisories/GHSA-j975-95f5-7wqh ([email protected])