CVE-2026-63119

CVE-2026-63119CVE-2026-63119

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.

Scoring

CVSS 6.2 ()
VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Last modified2026-07-29
Sourced from NVD. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.