CVE-2021-23700: Merge-DEEP2 Project Merge-DEEP2

Critical severity, CVSS 9.8. EPSS: 1.2% chance of exploitation in the next 30 days.

All versions of package merge-deep2 are vulnerable to Prototype Pollution via the mergeDeep() function.

Affected products

• Merge-DEEP2 Project Merge-DEEP2: any version

Published 2021-12-10. Last modified 2026-06-17.