4.0
Medium
CVE-2026-16266 Versions of the package mongo-object before 3.0.3 are vulnerable to Prototype Pollution via the expandKey() function…
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__.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| mongo-object 3.0 | earliest → < 3.0.3 | 3.0.3 |