CVE-2022-27810: Facebook Hermes

High severity, CVSS 7.5. EPSS: 0.9% chance of exploitation in the next 30 days.

It was possible to trigger an infinite recursion condition in the error handler when Hermes executed specific maliciously formed JavaScript. This condition was only possible to trigger in dev-mode (when asserts were enabled). This issue affects Hermes versions prior to v0.12.0.

Affected products

• Facebook Hermes: before 0.12.0 (fixed in 0.12.0)

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