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mcp@1.3.0rc1 vulnerabilities

Model Context Protocol SDK

  • latest version

    1.12.0

  • latest non vulnerable version

    1.12.0

  • first published

    8 months ago

  • latest version published

    4 days ago

  • licenses detected

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    Direct Vulnerabilities

    Known vulnerabilities in the mcp package. This does not include vulnerabilities belonging to this package’s dependencies.

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    VulnerabilityVulnerable Version
    • H
    Uncaught Exception

    mcp is a Model Context Protocol SDK

    Affected versions of this package are vulnerable to Uncaught Exception due to improper validation in the FastMCP Server process. An attacker can cause the service to become unavailable by sending malformed requests that trigger unhandled exceptions, resulting in repeated 500 errors and requiring manual intervention to restore normal operation.

    How to fix Uncaught Exception?

    Upgrade mcp to version 1.9.4 or higher.

    [,1.9.4)
    • H
    Uncaught Exception

    mcp is a Model Context Protocol SDK

    Affected versions of this package are vulnerable to Uncaught Exception via the _receive_loop function in the shared/session.py file. An attacker can cause the server to crash and require a restart by deliberately triggering an exception after establishing a streamable HTTP session.

    How to fix Uncaught Exception?

    Upgrade mcp to version 1.10.0 or higher.

    [,1.10.0)
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