CVE-2026-58045

Name	CVE-2026-58045
Description	A flaw in Node.js allows a spoofed `TypedArray` `byteLength` to trigger a reachable assertion in the synchronous `node:zlib` APIs, causing the entire process to crash. All 11 synchronous zlib functions are affected. Repeated exploitation of this condition can result in a denial of service. This vulnerability affects Node.js 22.x, 24.x, and 26.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)

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	24.18.0+dfsg+~cs24.13.2-1	vulnerable
	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#nodezlib-sync-apis-can-crash-on-spoofed-typedarray-length-cve-2026-58045---medium