High severity · published Sep 11, 2026
CVE-2026-78224
NextGen Healthcare Mirth Connect Improper Restriction of XML External Entity Reference
8.2
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 38% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MC
Mirth Connect · NextGen Healthcare
through 4.7.1 · source: vendor
In the news
VulnerabilityHigh
NextGen Healthcare Mirth Connect
View CSAF Summary Successful exploitation of these vulnerabilities could allow an attacker to exfiltrate date or cause a denial-of-service condition. The following versions of NextGen Healthcare Mirth Connect are affected: Mirth Connect <=v4.7.1 (CVE-2026-82583, CVE-2026-78224, CVE-2026-82578) CVSS Vendor Equipment Vulnerabilities v3 8.3 NextGen Healthcare NextGen Healthcare Mirth Connect Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection'), Improper Restriction of XML External Entity Reference Background Critical Infrastructure Sectors: Healthcare and Public Health Countries/Areas Deployed: Worldwide Company Headquarters Location: United States Vulnerabilities Expand All + CVE-2026-82583 NextGen Connect (Mirth Connect) versions 4.7.1 and earlier allow an authenticated user to execute arbitrary SQL through a Database Connector API, which could result in disclosure of stored credentials for connected systems, arbitrary file write, and a denial-of-service condition. View CVE Details Affected Products NextGen Healthcare Mirth Connect Vendor: NextGen Healthcare Product Version: NextGen Healthcare Mirth Connect: <=v4.7.1 Product Status: known_affected Remediations Vendor fix NextGen recommends users update Mirth Connect v4.7.2 or later. Users can download the latest version from the NextGen Healthcare customer portal....
Sep 10, 2026·CISA Advisories
Affected product
MC
Mirth Connect
NextGen Healthcare
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NextGen Healthcare Mirth Connect Improper Restriction of XML External Entity Reference