What’s Vulnerable › Vulnerabilities

CVE-2018-16487: Prototype Pollution in lodash

• Severity: medium (CVSS 5.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-02-01 · updated 2026-06-17
• Weakness: CWE-400

Description

A prototype pollution vulnerability was found in lodash <4.17.11 where the functions merge, mergeWith, and defaultsDeep can be tricked into adding or modifying properties of Object.prototype.

Affected products

• lodash: before 4.17.11 — fixed in 4.17.11
• Npm Lodash: before 4.17.11 — fixed in 4.17.11
• Rubygems Lodash-Rails: before 4.17.11; 0.10.0, 0.7.0, 0.8.1, 0.8.2, 0.9.0, 0.9.1 (+46) — fixed in 4.17.11

How to fix

Upgrade to a fixed version: lodash 4.17.11; Npm Lodash 4.17.11; Rubygems Lodash-Rails 4.17.11. Check the vendor advisory for mitigations.

References

• https://hackerone.com/reports/380873
• https://security.netapp.com/advisory/ntap-20190919-0004/
• https://hackerone.com/reports/380873
• https://security.netapp.com/advisory/ntap-20190919-0004/

Get alerted when CVE-2018-16487 or the next vulnerability affects your stack