GHSA-7683-3W9X-CH42 MCP Ruby SDK: Unbounded line buffer in stdio transports leads to memory exhaustion (DoS)

Summary The stdio transports in MCP::Server::Transports::StdioTransport and MCP::Client::Stdio read newline-delimited JSON-RPC frames using IOgets with no limit argument. CRuby's IOgets with no limit reads from the current position until the next separator \n with no upper bound on the returned...

CVE-2026-63119 MCP Ruby SDK: Unbounded line buffer in stdio transports leads to memory exhaustion (DoS)

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 IOgets without a byte limit, allowing a peer that sends data without a newline to exhaust process memory. This...

CVE-2026-63119

The CVE affects the MCP Ruby SDK (mcp gem), specifically MCP::Server::Transports::StdioTransport and MCP::Client::Stdio. The vulnerability arises from using IO#gets without a byte limit, allowing an attacker to send data without a newline and trigger unbounded line buffering, causing memory exhau...

MinIO affected a DoS via Unbounded Memory Allocation in S3 Select CSV Parsing

Impact What kind of vulnerability is it? Who is impacted? MinIO's S3 Select feature is vulnerable to memory exhaustion when processing CSV files containing lines longer than available memory. The CSV reader's nextSplit function calls bufio.Reader.ReadBytes'\n' with no size limit, buffering the...