hapifhir HAPI FHIR up to 6.9.9 XsltUtilities XsltUtilities.java saxonTransform xml external entity reference

CVSS Meta Temp Score
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CTI Interest Score
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7.0$0-$5k0.55

Summaryinfo

A vulnerability identified as critical has been detected in hapifhir HAPI FHIR up to 6.9.9. The impacted element is the function saxonTransform of the file org/hl7/fhir/utilities/XsltUtilities.java of the component XsltUtilities. Performing a manipulation results in xml external entity reference. This vulnerability was named CVE-2026-55471. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in hapifhir HAPI FHIR up to 6.9.9. It has been classified as critical. This affects the function saxonTransform of the file org/hl7/fhir/utilities/XsltUtilities.java of the component XsltUtilities. The manipulation with an unknown input leads to a xml external entity reference vulnerability. CWE is classifying the issue as CWE-611. The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-55471 since 06/17/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 6.9.10 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Xml external entity reference
CWE: CWE-611 / CWE-610
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Upgrade: HAPI FHIR 6.9.10

Timelineinfo

06/17/2026 CVE reserved
07/08/2026 +21 days VulDB entry created
07/09/2026 +0 days Advisory disclosed
07/09/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-55471 (🔒)
GCVE (CVE): GCVE-0-2026-55471
GCVE (VulDB): GCVE-100-377043

Entryinfo

Created: 07/09/2026 00:24
Changes: 07/09/2026 00:24 (55)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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