CVE-2026-55471

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-55471
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.

9.1 /10

CVSS v3 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://github.com/hapifhir/org.hl7.fhir.core/commit/01ca2ecdefec9b33204d2495fe78af8c0dc52298 Patch
https://github.com/hapifhir/org.hl7.fhir.core/releases/tag/6.9.10 Release Notes
https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-2f55-g35j-5jmf Exploit Third Party Advisory
https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-2f55-g35j-5jmf Exploit Third Party Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:hapifhir:hl7_fhir_core:*:*:*:*:*:*:*:*
History

16 Jul 2026, 16:32

Type Values Removed Values Added
First Time Hapifhir hl7 Fhir Core
Hapifhir
CPE cpe:2.3:a:hapifhir:hl7_fhir_core:*:*:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 9.1
References () https://github.com/hapifhir/org.hl7.fhir.core/commit/01ca2ecdefec9b33204d2495fe78af8c0dc52298 - () https://github.com/hapifhir/org.hl7.fhir.core/commit/01ca2ecdefec9b33204d2495fe78af8c0dc52298 - Patch
References () https://github.com/hapifhir/org.hl7.fhir.core/releases/tag/6.9.10 - () https://github.com/hapifhir/org.hl7.fhir.core/releases/tag/6.9.10 - Release Notes
References () https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-2f55-g35j-5jmf - () https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-2f55-g35j-5jmf - Exploit, Third Party Advisory

09 Jul 2026, 14:16

Type Values Removed Values Added
References () https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-2f55-g35j-5jmf - () https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-2f55-g35j-5jmf -

08 Jul 2026, 22:17

Type Values Removed Values Added
New CVE
Information

Published : 2026-07-08 22:17

Updated : 2026-07-16 16:32

NVD link : CVE-2026-55471

Mitre link : CVE-2026-55471

CVE.ORG link : CVE-2026-55471

JSON object : View

Products Affected

hapifhir

  • hl7_fhir_core
CWE
CWE-611

Improper Restriction of XML External Entity Reference