CVE-2020-28499: Merge Project Merge

Critical severity, CVSS 9.8. EPSS: 1.4% chance of exploitation in the next 30 days.

All versions of package merge are vulnerable to Prototype Pollution via _recursiveMerge .

Affected products

• Merge Project Merge: before 2.1.1 (fixed in 2.1.1)

Published 2021-02-18. Last modified 2026-06-17.