merge-deep before 3.0.3 can be tricked into overwriting properties of Object.prototype or adding new properties to it. These properties are then inherited by every object in the program, thus facilitating prototype-pollution attacks against applications using this library.
Upgrade to version 3.0.3 or later
publishedAdvisory PublishedJun 7th, 2021
reportedReported by AnonymousJun 7th, 2021