What’s Vulnerable › Vulnerabilities

CVE-2018-3719

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-06-07 · updated 2026-06-17
• Weakness: CWE-471

Description

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

• HackerOne mixin-deep node module: before 1.3.1 — fixed in 1.3.1

How to fix

Upgrade to a fixed version: HackerOne mixin-deep node module 1.3.1. Check the vendor advisory for mitigations.

References

• https://github.com/jonschlinkert/mixin-deep/commit/578b0bc5e74e14de9ef4975f504dc698796bdf9c
• https://hackerone.com/reports/311236
• https://github.com/jonschlinkert/mixin-deep/commit/578b0bc5e74e14de9ef4975f504dc698796bdf9c
• https://hackerone.com/reports/311236

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