CVE-2026-58044

Name	CVE-2026-58044
Description	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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
nodejs (PTS)	bullseye	12.22.12~dfsg-1~deb11u4	vulnerable
	bullseye (security)	12.22.12~dfsg-1~deb11u8	vulnerable
	bookworm, bookworm (security)	18.20.4+dfsg-1~deb12u2	vulnerable
	trixie (security), trixie	20.19.2+dfsg-1+deb13u2	vulnerable
	forky, sid	24.19.0+dfsg+~cs24.13.3-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
nodejs	source	(unstable)	24.19.0+dfsg+~cs24.13.3-1

Notes

https://nodejs.org/en/blog/vulnerability/july-2026-security-releases#http-parser-header-truncation-can-enable-request-smuggling-cve-2026-58044---low
Fixed by: https://github.com/nodejs/node/commit/c8525ac3a6974f1db795d7fb5ac63e9f97a6fba5 (v22.23.2)