CVE-2025-53365
MCP Python SDK has Unhandled Exception in Streamable HTTP Transport ,Leading to Denial of Service
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MCP Python SDK has Unhandled Exception in Streamable HTTP Transport ,Leading to Denial of Service
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.
Reserved 2025-06-27 | Published 2025-07-04 | Updated 2025-07-04 | Assigner GitHub_Mgithub.com/...on-sdk/security/advisories/GHSA-j975-95f5-7wqh
github.com/modelcontextprotocol/python-sdk/pull/967
github.com/...ommit/7b420656de48cfdb90b39eb582e60b6d55c2f891
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