Model Context Protocol (MCP) Python SDK does not enable DNS rebinding protection by default

Description The Model Context Protocol MCP Python SDK does not enable DNS rebinding protection by default for HTTP-based servers. When an HTTP-based MCP server is run on localhost without authentication using FastMCP with streamable HTTP or SSE transport, and has not configured...

EUVD-2025-200273

Model Context Protocol MCP Python SDK does not enable DNS rebinding protection by default...

PT-2025-48747

Name of the Vulnerable Software and Affected Versions mcp versions prior to 1.23.0 Description The mcp Python SDK does not enable DNS rebinding protection by default for HTTP-based servers. If an HTTP-based MCP server is running on localhost without authentication, using FastMCP with streamable...

Model Context Protocol Python SDK 安全漏洞

Model Context Protocol Python SDK is a Model Context Protocol open source development tool for Model Context Protocol servers and clients. A security vulnerability exists in the Model Context Protocol Python SDK prior to version 1.23.0, which stems from the fact that DNS rebinding protection is n...

EUVD-2011-4155

Malware in sbrugna...

EUVD-2011-4154

Malware in sbrugna...

EUVD-2011-4153

Malware in sbrugna...

EUVD-2011-1371

Malware in sbrugna...

EUVD-2012-3484

Malware in sbrugna...

EUVD-2025-20094

Malicious code in bioql PyPI...

EUVD-2024-2345

Malicious code in bioql PyPI...

EUVD-2024-1498

Malicious code in bioql PyPI...

EUVD-2025-20093

Malicious code in bioql PyPI...

MAL-2025-25791 Malicious code in mailerlite-python-sdk (npm)

The package mailerlite-python-sdk was found to contain malicious code...

CVE-2025-53366

A flaw was found in MCP. The MCP Python SDK contains a validation error that leads to an unhandled exception when processing malformed requests. This flaw allows a remote attacker to trigger this condition by sending a crafted request, resulting in an application-level service interruption...

CVE-2025-53365

A flaw was found in MCP. The mcp Python SDK exhibits an uncaught exception when a client intentionally triggers an error following the establishment of a streamable HTTP session. This condition allows a remote attacker to cause a program crash. The vulnerability stems from a lack of exception...

CVE-2025-53366

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

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...

MCP Python SDK vulnerability in the FastMCP Server causes validation error, leading to DoS

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 y...

GHSA-J975-95F5-7WQH MCP Python SDK has Unhandled Exception in Streamable HTTP Transport, Leading to Denial of Service

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...