Em resumo
- CVE-2025-53366 é uma vulnerabilidade ALTO (CVSS 8.7) que afeta mcp.
- Chance de exploração nos próximos 30 dias (EPSS): 9.8%, maior que 95.5% das vulnerabilidades.
- Correção: atualize para 1.9.4 ou posterior.
| Package | Affected versions | Patched versions |
|---|
| mcp PyPI | < 1.9.4
| 1.9.4
|
Description
A validation error in the MCP SDK can cause an unhandled exception when processing malformed requests, resulting in service unavailability (500 errors) until manually restarted. Impact may vary depending on the deployment conditions, and presence of infrastructure-level resilience measures.
Thank you to Rich Harang for reporting this issue.
NVD description
The MCP Python SDK, called `mcp` on PyPI, is a Python implementation of the Model Context Protocol (MCP). Prior to version 1.9.4, a validation error in the MCP SDK can cause an unhandled exception when processing malformed requests, resulting in service unavailability (500 errors) until manually restarted. Impact may vary depending on the deployment conditions, and presence of infrastructure-level resilience measures. Version 1.9.4 contains a patch for the issue.
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