CVE-2025-53365 (GCVE-0-2025-53365)
Vulnerability from cvelistv5
Published
2025-07-04 22:03
Modified
2025-07-08 13:53
Severity ?
8.7 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CWE
Summary
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.
References
security-advisories@github.comhttps://github.com/modelcontextprotocol/python-sdk/commit/7b420656de48cfdb90b39eb582e60b6d55c2f891
security-advisories@github.comhttps://github.com/modelcontextprotocol/python-sdk/pull/967
security-advisories@github.comhttps://github.com/modelcontextprotocol/python-sdk/security/advisories/GHSA-j975-95f5-7wqh
Impacted products
Vendor Product Version
modelcontextprotocol python-sdk Version: < 1.10.0
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