CVE-2021-23561: c2fo Comb

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

All versions of package comb are vulnerable to Prototype Pollution via the deepMerge() function.

Affected products

• c2fo Comb: any version

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