Description
All versions of upmerge are vulnerable to Prototype Pollution. The merge() function fails to prevent user input to alter an Object’s prototype, allowing attackers to modify override properties of all objects in the application. This may lead to Denial of Service or may be chained with other vulnerabilities leading to Remote Code Execution.
Recommendation
No fix is available yet. Followings are affected versions:
- <= 0.1.8
References
Related Issues
- Velocity.js has a Prototype Pollution vulnerability through #set path assignment - CVE-2026-44966
- Prototype Pollution in json-logic-js - Vulnerability
- Prototype pollution vulnerability found in Mermaid's bundled version of DOMPurify - Vulnerability
- Prototype Pollution in unflatten - Vulnerability
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- Tags:
- npm
- upmerge
Anything's wrong? Let us know Last updated on January 09, 2023