---
title: "CVE-2026-78224: XSLT Transformer Step - XML External Entity Injection"
description: "XSLT Transformer Step contains an XML External Entity (XXE) injection caused by insecure TransformerFactory configuration, letting attackers exfiltrate data and cause denial-of-service, exploit requires crafted XML input."
url: https://panop.io/threat-heartbeat/CVE-2026-78224/
---

# CVE-2026-78224 XSLT Transformer Step - XML External Entity Injection

XSLT Transformer Step contains an XML External Entity (XXE) injection caused by insecure TransformerFactory configuration, letting attackers exfiltrate data and cause denial-of-service, exploit requires crafted XML input.

CVSS base score 8.2 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.44% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-78224)

## Details

Type

XML External Entity Injection

Impact

Information Disclosure, Denial Of Service

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L

Published

11 September 2026

Updated

15 October 2026

Weakness

[CWE-611](https://cwe.mitre.org/data/definitions/611.html)

## Vendor fix

Configure TransformerFactory with proper security options or update to a secure version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-78224](https://nvd.nist.gov/vuln/detail/CVE-2026-78224)
- [https://github.com/cisagov/CSAF/blob/develop/csaf\_files/OT/white/2026/icsma-26-253-01.json](https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsma-26-253-01.json)
- [https://www.cisa.gov/news-events/ics-medical-advisories/icsma-26-253-01](https://www.cisa.gov/news-events/ics-medical-advisories/icsma-26-253-01)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)