CVE-2025-53366 MCP SDK Vulnerable to FastMCP Server Validation Error, Leading to Denial of Service

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...

CVE-2025-53365 MCP Python SDK has Unhandled Exception in Streamable HTTP Transport ,Leading to Denial of Service

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...

CVE-2025-53365

The MCP Python SDK (package name mcp) has a CVE-2025-53365 issue affecting versions prior to 1.10.0. If a client deliberately triggers an exception after establishing a streamable HTTP session, the server can emit an uncaught ClosedResourceError, potentially crashing the server and requiring a re...

CVE-2025-53365 MCP Python SDK has Unhandled Exception in Streamable HTTP Transport ,Leading to Denial of Service

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...

PT-2025-28026

Name of the Vulnerable Software and Affected Versions: MCP Python SDK versions prior to 1.10.0 Description: The issue arises when a client deliberately triggers an exception after establishing a streamable HTTP session, leading to an uncaught ClosedResourceError on the server side. This can cause...

CVE-2025-53365: Uncaught Exception

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...

PT-2025-28027

Name of the Vulnerable Software and Affected Versions: MCP Python SDK versions prior to 1.9.4 Description: A validation error in the MCP SDK can cause an unhandled exception when processing malformed requests, resulting in service unavailability until manually restarted. The impact may vary...