CVE-2026-58045

MediumCVSS 6.2/10Last modified Oct 23, 2026

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**.

Metrics

CVSS 3.0 6.2/10CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-400

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

Vendor	Product	Versions
nodejs	node	>= 26.5.0, <= 26.5.0; >= 24.18.0, <= 24.18.0; >= 22.23.1, <= 22.23.1

References

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

Timeline

Published: Aug 4, 2026
Last modified: Oct 23, 2026
NVD status: Awaiting Analysis

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