CVE-2026-40879— Nest: DoS via Recursive handleData in JsonSocket (TCP Transport)
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I. Basic Information for CVE-2026-40879
Vulnerability Information
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Vulnerability Title
Nest: DoS via Recursive handleData in JsonSocket (TCP Transport)
Source: NVD (National Vulnerability Database)
Vulnerability Description
Nest is a framework for building scalable Node.js server-side applications. Prior to 11.1.19, when an attacker sends many small, valid JSON messages in one TCP frame, handleData() recurses once per message; the buffer shrinks each call. maxBufferSize is never reached; call stack overflows instead. A ~47 KB payload is sufficient to trigger RangeError. This vulnerability is fixed in 11.1.19.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
未经控制的递归
Source: NVD (National Vulnerability Database)
Vulnerability Title
nest 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
nest是nestjs开源的一个 Node.js 框架，用于使用 TypeScript/JavaScript 构建高效、可扩展和企业级的服务器端应用程序。 nest 11.1.19之前版本存在安全漏洞，该漏洞源于handleData函数在处理单个TCP帧中多个小型有效JSON消息时递归调用，可能导致调用栈溢出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-40879
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IV. Related Vulnerabilities
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