All the vulnerabilities related to the version 1.0.0 of the package
Prototype Pollution in merge-deep
Versions of merge-deep
before 3.0.1 are vulnerable to prototype pollution via merging functions.
Update to version 3.0.1 or later.
Prototype pollution in Merge-deep
The merge-deep library before 3.0.3 for Node.js 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.