CVE-2026-78224: NextGen Healthcare Mirth Connect

High severity, CVSS 8.2. EPSS: 0.4% chance of exploitation in the next 30 days.

The XSLT Transformer Step builds a bare TransformerFactory without the proper security options set, so XXE injection can allow data exfiltration and denial-of-service attacks.

Affected products

• NextGen Healthcare Mirth Connect: up to and including 4.7.1

Published 2026-09-11. Last modified 2026-09-18.