Versions of lodash before 4.17.5 are vulnerable to prototype pollution.

The vulnerable functions are 'defaultsDeep', 'merge', and 'mergeWith' which allow 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.

Recommendation

Update to version 4.17.5 or later.

References

• https://nvd.nist.gov/vuln/detail/CVE-2018-3721
• https://hackerone.com/reports/310443
• GHSA-fvqr-27wr-82fm
• https://www.npmjs.com/advisories/577
• lodash/lodash@d8e069c
• https://security.netapp.com/advisory/ntap-20190919-0004