CVE-2021-23568: Eggjs EXTEND2

Critical severity, CVSS 9.8. EPSS: 1.5% chance of exploitation in the next 30 days.

The package extend2 before 1.0.1 are vulnerable to Prototype Pollution via the extend function due to unsafe recursive merge.

Affected products

• Eggjs EXTEND2: before 1.0.1 (fixed in 1.0.1)

Published 2022-01-10. Last modified 2026-06-17.