Uncaught Resource Error in Model Context Protocol Python SDK
CVE-2025-53365
8.7HIGH
What is CVE-2025-53365?
The MCP Python SDK, available on PyPI, is susceptible to a resource management issue wherein deliberate exceptions during an established streamable HTTP session can result in an uncaught ClosedResourceError. This error can destabilize server operations, necessitating a restart to restore service functionality. The impact may differ based on deployment specifics, including any underlying infrastructure resilience measures. The issue is resolved in version 1.10.0, which includes a patch to address this vulnerability.
Affected Version(s)
python-sdk < 1.10.0