CVE-2026-58045

State: Published
Severity: 6.2 Medium
Published: Aug 4, 2026
Updated: Aug 4, 2026
Reserved: Jun 27, 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**.

Scores

CVSS	Score	Vector	Source
3.0	6.2 Medium	CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	hackerone

Weaknesses

CWE-400 Uncontrolled Resource Consumption

Affected Products

Product	Versions
nodenodejs	26.5.0 through 26.5.0Affected 24.18.0 through 24.18.0Affected 22.23.1 through 22.23.1Affected

References

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

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