CVE-2021-23369: Handlebarsjs Handlebars

Critical severity, CVSS 9.8. EPSS: 7% chance of exploitation in the next 30 days.

The package handlebars before 4.7.7 are vulnerable to Remote Code Execution (RCE) when selecting certain compiling options to compile templates coming from an untrusted source.

Affected products

• Handlebarsjs Handlebars: before 4.7.7 (fixed in 4.7.7)

Published 2021-04-12. Last modified 2026-10-08.