Security Advisory

CVE-2026-63119

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-29 19:12:07

Last updated 2026-07-29 19:28:41

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::StdioTransport and MCP::Client::Stdio in the mcp gem use IO#gets without a byte limit, allowing a peer that sends data without a newline to exhaust process memory. This issue is fixed in version 0.23.0.

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