CVE-2026-55471

UNKNOWN 0.0

HAPI FHIR: XXE in XsltUtilities.saxonTransform via unhardened Saxon TransformerFactory

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to 6.9.10, org.hl7.fhir.utilities.XsltUtilities saxonTransform(...) overloads instantiated a bare net.sf.saxon.TransformerFactoryImpl() without ACCESS_EXTERNAL_DTD or ACCESS_EXTERNAL_STYLESHEET restrictions, allowing an attacker who controls or can tamper with transformed XML to trigger XML External Entity injection for local file disclosure and blind XXE or SSRF to arbitrary URLs reachable from the host. This issue is fixed in version 6.9.10.

CWE	CWE-611
Vendor	hapifhir
Product	org.hl7.fhir.core
Published	Jul 8, 2026
Last Updated	Jul 9, 2026

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Affected Versions

hapifhir / org.hl7.fhir.core

< 6.9.10

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-2f55-g35j-5jmf github.com: https://github.com/hapifhir/org.hl7.fhir.core/commit/01ca2ecdefec9b33204d2495fe78af8c0dc52298 github.com: https://github.com/hapifhir/org.hl7.fhir.core/releases/tag/6.9.10