https://db.gcve.eu/rss/recent/all/10 Most recent entries from all 2026-10-01T05:40:19.101050+00:00 Vulnerability-Lookup info@gcve.eu python-feedgen Contains only the most 10 recent entries. https://db.gcve.eu/vuln/cve-2025-53366 CVE-2025-53366 — MCP SDK Vulnerable to FastMCP Server Validation Error, Leading to Denial of Service 2026-10-01T05:40:19.105035+00:00

Affected: modelcontextprotocol python-sdk

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.

 https://db.gcve.eu/vuln/ghsa-3qhf-m339-9g5v GHSA-3qhf-m339-9g5v — MCP Python SDK vulnerability in the FastMCP Server causes validation error, leading to DoS 2026-10-01T05:40:19.105138+00:00

Affected: PyPI: mcp

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.

 https://db.gcve.eu/vuln/pysec-2026-1616 PYSEC-2026-1616 — MCP Python SDK vulnerability in the FastMCP Server causes validation error, leading to DoS 2026-10-01T05:40:19.105187+00:00

Affected: PyPI: mcp

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.