Prototype Pollution in extend

Description

Versions of extend prior to 3.0.2 (for 3.x) and 2.0.2 (for 2.x) are vulnerable to Prototype Pollution. The extend() 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

Update the extend package to the latest compatible version. Followings are version details:

• Affected version(s): **< 2.0.2

  >= 3.0.0, < 3.0.2**

• Patched version(s): **2.0.2

  3.0.2**

References

• GHSA-qrmc-fj45-qfc2
• hackerone.com
• www.npmjs.com
• CVE-2018-16492
• CWE-400
• CAPEC-310
• OWASP 2021-A6

Related Issues

• jsPDF Denial of Service (DoS) - CVE-2025-57810
• MailDev Remote Code Execution - CVE-2024-27448
• vxe-table prototype pollution - CVE-2024-57080
• Cross-Site Scripting in jquery - CVE-2020-7656

Tags:

npm

extend