CVE WatchJul 21, 2026

CVE-2026-16266

Versions of the package mongo-object before 3.0.3 are vulnerable to Prototype Pollution via the expandKey() function in util.js. An attacker

CVSS

4.0

Medium

EPSS

0.2%

p16

KEV

—

Exploit Today

0-100

Published: Jul 21, 2026 · Last modified: Jul 21, 2026 · CWE-1321

EPSS · 30d

Not enough EPSS history yet.

Technical 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__.

Official references

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