MCP TypeScript SDK: One HTTP request within the default size limit could exhaust server memory during validation

影響: npm:@modelcontextprotocol/sdk >= 1.3.0, < 1.32.0 → 1.32.0, npm:@modelcontextprotocol/server >= 2.0.0, < 2.3.0 → 2.3.0

In affected versions, servers put no limit on how many array elements and object keys they validated in one request. One HTTP request within the default 4 MiB size limit could exhaust the server's memory, and the process aborted with JavaScript heap out of memory. No credentials are needed, unless you authenticate requests before they reach the SDK. Am I affected? Yes, if clients you do not fully trust can reach your server over HTTP. The risk is highest for McpServer tools whose input…

在 GitHub Advisory Database 阅读

2026/10/21 05:06，GitHub Advisory Database 发布了“MCP TypeScript SDK: One HTTP request within the default size limit could exhaust server memory during validation”（类型：漏洞公告）。严重程度为“高危”（high）。相关技术：JavaScript / Node.js。CVE：CVE-2026-111768。