Vulnerabilities CVE-2026-58045

CVE-2026-58045

Medium

Open

TLP:CLEAR

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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**.

Details

CVSS Score: 6.2
EPSS Score ⓘ: 0.20%

9.9th percentile
CVSS Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Confidence: 90%
Published: Aug 4, 2026
Last Modified: Aug 4, 2026

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