XXE in Nextgen Healthcare Mirth Connect

CVE-2026-78224

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.

Vulnerability class: XXE (XML External Entity)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L.

EPSS exploit prediction

EPSS: 0.004 (37.7th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-78224: held from 0.004 to 0.004.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-78224?
CVE-2026-78224 is a high-severity vulnerability in Nextgen Healthcare Mirth Connect, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 8.2/10. Published 2026-09-11.
How severe is CVE-2026-78224?
High severity. CVSS v3 base score is 8.2 out of 10.