LOW 3.7 NVD

CVE-2026-58044

A flaw in Node.js HTTP client can cause a request desynchronization for Node.js-based forwarding proxies that rebuild outbound headers from the visible `Incomin

A 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**.

References

https://nodejs.org/en/blog/vulnerability/july-2026-security-releases

Published: 2026-08-04 · Source: NVD · Feed updated: 2026-08-04

This low severity vulnerability with a CVSS score of 3.7 was published on 2026-08-04 via NVD.

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