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Description

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.

PUBLISHED Reserved 2026-06-16 | Published 2026-07-08 | Updated 2026-07-09 | Assigner GitHub_M




HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N

Problem types

CWE-611: Improper Restriction of XML External Entity Reference

Product status

< 6.9.10
affected

References

github.com/...r.core/security/advisories/GHSA-2f55-g35j-5jmf exploit

github.com/...r.core/security/advisories/GHSA-2f55-g35j-5jmf

github.com/...ommit/01ca2ecdefec9b33204d2495fe78af8c0dc52298

github.com/hapifhir/org.hl7.fhir.core/releases/tag/6.9.10

cve.org (CVE-2026-55471)

nvd.nist.gov (CVE-2026-55471)

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