Prototype Pollution in lodash.merge

Description

Versions of lodash.merge before 4.6.1 are vulnerable to Prototype Pollution. The function ‘merge’ may 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.merge package to the latest compatible version. Followings are version details:

• Affected version(s): < 4.6.1
• Patched version(s): 4.6.1

References

• GHSA-2m96-9w4j-wgv7
• www.npmjs.com
• CWE-1321

Related Issues

• Prototype Pollution in lodash.merge (GHSA-h726-x36v-rx45) - Vulnerability
• Lodash has Prototype Pollution Vulnerability in `_.unset` and `_.omit` functions (GHSA-xxjr-mmjv-4gpg) 3 - CVE-2025-13465
• Prototype Pollution in lodash.defaultsdeep (GHSA-h5mp-5q4p-ggf5) - Vulnerability
• Prototype Pollution in lodash.defaultsdeep - Vulnerability

Tags:

npm

lodash.merge