CVE-2026-58045CWE-400denial-of-service

CVE-2026-58045

Medium · published August 4, 2026

CVSS v3.0
6.2
EPSS
0%
Percentile
5.6
In the wild
Unconfirmed
What it is

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**.

The record
Technical detail
CVSS v3.0
6.2 · MEDIUM
Vector
CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00167 · 5.6th percentile
Weakness
CWE-400 · Uncontrolled Resource Consumption
Published
2026-08-04T05:16Z
References (1)
https://nodejs.org/en/blog/vulnerability/july-2026-security-releases · [email protected]
EPSS history
Timeline
  • 04 AUG 00:49Z
    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…
    cvelistv5