Package Instance

Denial of Service and remote code execution.
Utilities function in mixin-deep can be tricked into modify the prototype of "Object" when the attacker control part of the structure passed to these function. This can let an attacker add or modify existing property that will exist on all object, leading to denial of service or remote code execution.

Prototype Pollution in mixin-deep
Versions of `mixin-deep` prior to 2.0.1 or 1.3.2 are vulnerable to Prototype Pollution. The `mixinDeep` function fails to validate which Object properties it updates. This allows attackers to modify the prototype of Object, causing the addition or modification of an existing property on all objects.


## Recommendation

If you are using `mixin-deep` 2.x, upgrade to version 2.0.1 or later.
If you are using `mixin-deep` 1.x, upgrade to version 1.3.2 or later.

Improper Input Validation
mixin-deep node suffers from a Modification of Assumed-Immutable Data (MAID) vulnerability, which allows a malicious user to modify the prototype of `Object` via `__proto__`, causing the addition or modification of an existing property that will exist on all objects.