CVE-2026-78224
Received Received - Intake

XSLT Transformer XXE Injection Vulnerability

Publication date: 2026-09-11

Last updated on: 2026-09-11

Assigner: ICS-CERT

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 Scores

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Meta Information

Published
2026-09-11
Last Modified
2026-09-11
Generated
2026-09-11
AI Q&A
2026-09-11
EPSS Evaluated
N/A
NVD
CVE-2026-78224
EUVD
EUVD-2026-76116

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
nextgen mirth_connect 4.7.2

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-611 The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.

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Executive Summary

This vulnerability involves the XSLT Transformer Step creating a TransformerFactory without proper security settings. This allows XML External Entity (XXE) injection attacks, which can lead to unauthorized data exfiltration and denial-of-service conditions.

Impact Analysis

An attacker could exploit this to steal sensitive data or disrupt services by sending malicious XML input. The high CVSS score indicates significant risk of confidentiality breaches and operational disruption.

Compliance Impact

This vulnerability could lead to unauthorized data access or loss, violating GDPR's data protection requirements and HIPAA's safeguards for protected health information. Non-compliance risks include fines and legal penalties.

Mitigation Strategies

Configure the XSLT Transformer Step to use a secure TransformerFactory with proper security options enabled to prevent XXE injection. Ensure all XML parsers are hardened with features like disabling external entity processing and DTDs.

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