High [CVE-2026-55471] XML External Entity injection allows local file disclosure and SSRF
This high-severity Red Hat Linux advisory covers CVE-2026-55471 affecting Red Hat Build of Apache Camel 4.18 for Quarkus 3.33, Red Hat build of Apache Camel 4 for Quarkus 3.
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Summary
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.
A flaw was found in the HAPI FHIR `XsltUtilities` component. The `saxonTransform` functions within this utility do not adequately restrict external entity access when processing XML.
Successful exploitation can lead to local file disclosure, enabling the attacker to read sensitive files from the system. Additionally, it can result in Server-Side Request Forgery (SSRF), where the attacker can force the system to make requests to arbitrary network resources, potentially exposing internal network information or cloud metadata.
An unauthenticated, remote attacker can exploit this by providing specially crafted XML data to disclose local files or perform Server-Side Request Forgery (SSRF).
- < 6.9.10
Official advisory · high-confidence parse· fetched 10 days ago·verify at source
- 6.9.10
- org.hl7.fhir.utilities
- RHSA-2026:54776
Official advisory · high-confidence parse· fetched 10 days ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Official advisory · high-confidence parse· fetched 10 days ago·verify at source
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