CVE-2018-3719: Mixin-Deep Project Mixin-Deep

High severity, CVSS 8.8. EPSS: 2.1% chance of exploitation in the next 30 days.

mixin-deep node module before 1.3.1 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.

Affected products

• Mixin-Deep Project Mixin-Deep: before 1.3.1 (fixed in 1.3.1)

Published 2018-06-07. Last modified 2026-06-17.