VULNERABILITY INTELLIGENCE

CVE-2018-16489

CVSS score9.8 CRITICAL

EPSS probability1.84%

CISA KEVNot currently listed

Published2019-02-01

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

A prototype pollution vulnerability was found in just-extend <4.0.0 that allows attack to inject properties onto Object.prototype through its functions.

Weakness classification

CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CWE-400: Uncontrolled Resource Consumption

Primary references

support@hackerone.com — Exploit, Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Issue Tracking, Third Party Advisory