Description
Versions of lodash before 4.17.11 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 {constructor: {prototype: {...}}} causing the addition or modification of an existing property that will exist on all objects.
Recommendation
Update the lodash package to the latest compatible version. Followings are version details:
- Affected version(s): < 4.17.11
- Patched version(s): 4.17.11
References
Related Issues
- Prototype Pollution in lodash - CVE-2018-3721
- Prototype Pollution in lodash - lodash - GHSA-jf85-cpcp-j695 - CVE-2019-10744
- Prototype Pollution in lodash - lodash-amd - CVE-2019-10744
- Prototype Pollution in lodash - lodash.defaultsdeep - CVE-2019-10744
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- Tags:
- npm
- lodash
Anything's wrong? Let us know Last updated on August 12, 2025


