Prototype Pollution in nconf

2022-04-1300:00:30

Google

osv.dev

nconf

memory engine

nested json

configuration

set function

vulnerability

prototype pollution

object.prototype

EPSS

0.002

Percentile

53.3%

JSON

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.