CVE-2025-53365 (GCVE-0-2025-53365)

Vulnerability from cvelistv5 – Published: 2025-07-04 22:03 – Updated: 2025-07-08 13:53
VLAI?
Title
MCP Python SDK has Unhandled Exception in Streamable HTTP Transport ,Leading to Denial of Service
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.
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
Assigner
References
Impacted products
Vendor Product Version
modelcontextprotocol python-sdk Affected: < 1.10.0
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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