What is CVE-2026-58045?

CVE-2026-58045 is a medium-severity vulnerability in Node.js Node, classified under Uncontrolled Resource Consumption. CVSS score: 6.2/10. Published 2026-08-04.

How severe is CVE-2026-58045?

Medium severity. CVSS v3 base score is 6.2 out of 10.

Resource exhaustion in Node.js Node

CVE-2026-58045

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**.

Vulnerability class: DoS (Denial of Service)

EPSS: 0.002 (6.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Nodejs Node — versions 26.5.0, 24.18.0, 22.23.1

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

support@hackerone.com

Frequently asked questions

What is CVE-2026-58045?: CVE-2026-58045 is a medium-severity vulnerability in Node.js Node, classified under Uncontrolled Resource Consumption. CVSS score: 6.2/10. Published 2026-08-04.
How severe is CVE-2026-58045?: Medium severity. CVSS v3 base score is 6.2 out of 10.