CVE-2026-16266

MediumCVSS 4.0/10Last modified Jul 23, 2026

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__.

Metrics

CVSS 3.1 4.0/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N

Weakness enumeration

CWE-1321

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

Vendor	Product	Versions
n/a	mongo-object	< 3.0.3

References

Timeline

Published: Jul 21, 2026
Last modified: Jul 23, 2026
NVD status: Awaiting Analysis

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