CVE-2022-21803: Nconf Project Nconf

High severity, CVSS 7.5. EPSS: 1.8% chance of exploitation in the next 30 days.

This affects the package nconf before 0.11.4. When using the memory engine, it is possible to store a nested JSON representation of the configuration. The .set() function, that is responsible for setting the configuration properties, is vulnerable to Prototype Pollution. By providing a crafted property, it is possible to modify the properties on the Object.prototype.

Affected products

• Nconf Project Nconf: before 0.11.4 (fixed in 0.11.4)

Published 2022-04-12. Last modified 2026-06-17.