What’s Vulnerable › Vulnerabilities

CVE-2018-3723

• Severity: high (CVSS 8.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.0% 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

defaults-deep node module before 0.2.4 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 defaults-deep: before 0.2.4 — fixed in 0.2.4

How to fix

Upgrade to a fixed version: HackerOne defaults-deep 0.2.4. Check the vendor advisory for mitigations.

References

• https://github.com/jonschlinkert/defaults-deep/commit/c873f341327ad885ff4d0f23b3d3bca31b0343e5
• https://hackerone.com/reports/310514
• https://github.com/jonschlinkert/defaults-deep/commit/c873f341327ad885ff4d0f23b3d3bca31b0343e5
• https://hackerone.com/reports/310514

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