Vulnerabilities/

Prototype Pollution in lodash

Severity:
Medium

Description

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 the lodash package to the latest compatible version. Followings are version details:

References

Related Issues

Tags:
npm
lodash
Anything's wrong? Let us know Last updated on August 12, 2025

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