Description
Versions of lodash before 4.17.12 are vulnerable to Prototype Pollution. The function defaultsDeep allows 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-amd package to the latest compatible version. Followings are version details:
- Affected version(s): < 4.17.13
- Patched version(s): 4.17.13
References
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Start a free scanRelated Issues
- Lodash has Prototype Pollution Vulnerability in `_.unset` and `_.omit` functions - lodash-amd - CVE-2025-13465
- lodash vulnerable to Prototype Pollution via array path bypass in `_.unset` and `_.omit` - lodash-amd - CVE-2026-2950
- Prototype Pollution in lodash - lodash-es - GHSA-jf85-cpcp-j695 - CVE-2019-10744
- Prototype Pollution in lodash - lodash.defaultsdeep - CVE-2019-10744
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See something that needs correcting? Let us knowUpdated August 12, 2025