Security Advisory

CVE-2026-67430

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-29 19:10:39

Last updated 2026-07-29 19:10:39

Assigner GitHub_M

CVSS score not scored

State PUBLISHED

Description

MCP Ruby SDK is the official Ruby SDK for Model Context Protocol servers and clients. Prior to 0.23.0, MCP::Server::Transports::StreamableHTTPTransport in the mcp gem does not expire sessions by default, so repeated initialize requests retain unbounded ServerSession objects and can exhaust process memory. This issue is fixed in version 0.23.0.

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