8.7
High
CVE-2025-53365 The MCP Python SDK, called `mcp` on PyPI, is a Python implementation of the Model Context Protocol (MCP)
Description
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| python-sdk 1.10 | earliest → < 1.10.0 | 1.10.0 |
References
- github.com github.com
- github.com github.com
- github.com github.com
Timeline
- Published
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