CVE-2021-23438

CVE-2021-23438

npm/mpath

Access of Resource Using Incompatible Type (Type Confusion)

This affects the package mpath A type confusion vulnerability can lead to a bypass of CVE-2018-16490. In particular, the condition ignoreProperties.indexOf(parts[i]) !== -1 returns -1 if parts[i] is ['__proto__']. This is because the method that has been called if the input is an array is Array.prototype.indexOf() and not String.prototype.indexOf(). They behave differently depending on the type of the input.

All versions before 0.8.4

Upgrade to version 0.8.4 or above.

2021-09-13