CVE-2026-55471

CVE-2026-55471 affects HAPI FHIR: org.hl7.fhir.utilities XsltUtilities.saxsonTransform overloads (XsltUtilities.saxonTransform) prior to 6.9.10. The root cause is the use of a bare net.sf.saxon.TransformerFactoryImpl() without ACCESS_EXTERNAL_DTD and ACCESS_EXTERNAL_STYLESHEET restrictions, enabl...

GHSA-2F55-G35J-5JMF HAPI FHIR: XXE in XsltUtilities.saxonTransform via unhardened Saxon TransformerFactory

Summary org.hl7.fhir.utilities.XsltUtilities exposes two parallel families of XSLT transform helpers. The transform... overloads obtain their TransformerFactory from the project's hardened helper XMLUtil.newXXEProtectedTransformerFactory which sets ACCESSEXTERNALDTD="" and...