CVE-2026-58045 — MEDIUM (6.2)

Vulnerability 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**.

CVSS Score

6.2

MEDIUM

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

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Related Weaknesses (CWE)

CWE-400

References

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

FAQ

What is CVE-2026-58045?

CVE-2026-58045 is a vulnerability with a CVSS score of 6.2 (MEDIUM). 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 function...

How severe is CVE-2026-58045?

CVE-2026-58045 has been rated MEDIUM with a CVSS base score of 6.2/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-58045?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.