What’s Vulnerable › Vulnerabilities

CVE-2018-3720

• Severity: high (CVSS 8.8 v3.1)
• 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

assign-deep node module before 0.4.7 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

• assign-deep: before 0.4.7 — fixed in 0.4.7

How to fix

Upgrade to a fixed version: assign-deep 0.4.7. Check the vendor advisory for mitigations.

References

• https://github.com/jonschlinkert/assign-deep/commit/19953a8c089b0328c470acaaaf6accdfcb34da11
• https://hackerone.com/reports/310707
• https://github.com/jonschlinkert/assign-deep/commit/19953a8c089b0328c470acaaaf6accdfcb34da11
• https://hackerone.com/reports/310707

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