CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:NA flaw in Node.js HTTP client can cause a request desynchronization for Node.js-based forwarding proxies that rebuild outbound headers from the visible `IncomingMessage` headers while piping the original body to a reused backend connection. Node.js can omit headers beyond `maxHeadersCount` / `maxHeaderPairs` from `req.headers`, `req.rawHeaders`, and `req.headersDistinct`, while still using those omitted headers internally for HTTP message framing. In particular, `Content-Length` can be hidden from userland while the request body is still delivered. This vulnerability affects all supported release lines: **Node.js 22**, **Node.js 24**, and **Node.js 26**.
Multiple vulnerabilities have been discovered in Node.js, impacting versions 22.x, 24.x, and 26.x prior to the specified release dates. These vulnerabilities can lead to data integrity compromise, data confidentiality is…