CVE-2026-105481

Name	CVE-2026-105481
Description	A flaw in Node.js HTTP Agent connection reuse can cause a client to accept as valid a response that was sent before the client has sent the request. This is an incomplete fix of CVE-2026-48931. The guard that destroys idle keep-alive sockets when unexpected data arrives only runs when the event loop polls for I/O. If an unsolicited response has already reached the socket but has not been read yet when the socket is handed to a new request, for example because the event loop was busy with synchronous work, the guard is removed without seeing it and the data is parsed as the response to the new request. This vulnerability affects Node.js 26.x, 24.x, and 22.x.
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)
Debian Bugs	1151688, 1151859

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
nodejs (PTS)	bookworm	18.20.4+dfsg-1~deb12u2	vulnerable
	bookworm (security)	18.20.4+dfsg-1~deb12u3	vulnerable
	trixie	20.19.2+dfsg-1+deb13u2	vulnerable
	trixie (security)	20.19.2+dfsg-1+deb13u3	vulnerable
	forky, sid	24.22.2+dfsg+~cs24.19.2-1	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)	24.22.1+dfsg+~cs24.19.2-1			1151688, 1151859

Notes

https://nodejs.org/en/blog/vulnerability/october-2026-security-releases#keep-alive-socket-process-a-response-that-was-written-before-the-request-was-sent-cve-2026-105481---medium
Fixed by: https://github.com/nodejs/node/commit/e7b2985d5978add59d8a9d58743a5884d2b3eabc (v22.23.4)