Is CVE-2026-58045 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-58045?

CVE-2026-58045 has a CVSS v3 severity of MEDIUM (6.2).

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CVE-2026-58045

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**.