Critical severity9.1NVD Advisory· Published Jul 8, 2026· Updated Jul 16, 2026
CVE-2026-55471
CVE-2026-55471
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
ca.uhn.hapi.fhir:org.hl7.fhir.utilitiesMaven | < 6.9.10 | 6.9.10 |
Affected products
3- Range: <=6.9.8
Patches
Vulnerability mechanics
References
4- github.com/hapifhir/org.hl7.fhir.core/commit/01ca2ecdefec9b33204d2495fe78af8c0dc52298nvdPatch
- github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-2f55-g35j-5jmfnvdExploitThird Party AdvisoryWEB
- github.com/advisories/GHSA-2f55-g35j-5jmfghsaADVISORY
- github.com/hapifhir/org.hl7.fhir.core/releases/tag/6.9.10nvdRelease Notes
News mentions
0No linked articles in our index yet.