Prototype Pollution in smart-extend

Description

All versions of smart-extend are vulnerable to Prototype Pollution. The deep() function allows attackers to modify the prototype of Object causing the addition or modification of an existing property that will exist on all objects.

Recommendation

No fix is available yet. Followings are affected versions:

• >= 0

References

• GHSA-f8h3-rqrm-47v9
• hackerone.com
• www.npmjs.com
• CWE-1321

Related Issues

• Lodash has Prototype Pollution Vulnerability in `_.unset` and `_.omit` functions - CVE-2025-13465
• Prototype Pollution in lodash.merge (GHSA-h726-x36v-rx45) - Vulnerability
• Prototype Pollution in lodash.mergewith (GHSA-5947-m4fg-xhqg) - Vulnerability
• Prototype Pollution in lodash.mergewith - Vulnerability

Tags:

npm

smart-extend