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CVE-2026-58045

MEDIUM
6.2
CVSS Score
Published: August 4, 2026 at 12:49 AM UTC
Updated: October 23, 2026 at 11:10 PM UTC
1 product affected across 1 vendorNode.js

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Severity
MEDIUM6.2
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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**.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Node.js· Node.js
90%
v ≤ 22.23.1v ≤ 24.18.0v ≤ 26.5.022.23.124.18.026.5.0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

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

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.2MEDIUMhackerone
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-400

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