VULNERABILITY INTELLIGENCE

CVE-2026-16266

CVSS score6.3 MEDIUM

EPSS probability0.42%

CISA KEVNot currently listed

Published2026-07-21

Last modified2026-07-23

Description

Versions of the package mongo-object before 3.0.3 are vulnerable to Prototype Pollution via the expandKey() function in util.js. An attacker can modify the JavaScript prototype chain by supplying a crafted property path containing special keys such as __proto__.