What is CVE-2026-82578?

CVE-2026-82578 is a high-severity vulnerability in Nextgen Healthcare Mirth Connect, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 7.5/10. Published 2026-09-11.

How severe is CVE-2026-82578?

High severity. CVSS v3 base score is 7.5 out of 10.

XXE in Nextgen Healthcare Mirth Connect

CVE-2026-82578

When XML batch processing is turned on and the XPath option is selected, the raw batch input goes through a default XPath/JAXP setup with no entity restrictions, so XXE injection can allow data exfiltration and denial-of-service attacks.

Vulnerability class: XXE (XML External Entity)

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Nextgen Healthcare Mirth Connect

Weakness classification (CWE)

CWE-611 — Improper Restriction of XML External Entity Reference (XXE)

References

ics-cert@hq.dhs.gov
ics-cert@hq.dhs.gov

Frequently asked questions

What is CVE-2026-82578?: CVE-2026-82578 is a high-severity vulnerability in Nextgen Healthcare Mirth Connect, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 7.5/10. Published 2026-09-11.
How severe is CVE-2026-82578?: High severity. CVSS v3 base score is 7.5 out of 10.