CVE Catalog

CVE-2026-16266

MediumCVSS 4.0
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.25%

16th percentile - higher than 16% of all known CVEs

Summary

The mongo-object package before version 3.0.3 is 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 keys like `__proto__`.

Risk Assessment

This vulnerability allows an attacker to inject properties into global objects, potentially leading to privilege escalation, arbitrary code execution, or security bypass in applications using this library.

Recommendation

Upgrade the mongo-object package to version 3.0.3 or later.

Related vulnerabilities

Original NVD description (English source)

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__.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS