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.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
VulniPulse record published Record updated
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).
Is CVE-2026-55471 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2026-55471 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.
How do I fix CVE-2026-55471?
Upgrade to a fixed release named by Red Hat:
- 6.9.10
- org.hl7.fhir.utilities
- RHSA-2026:54776
Confirm against the vendor advisory before you patch.
- < 6.9.10
Official advisory · high-confidence parse· fetched 11 days ago·verify at source
- 6.9.10
- org.hl7.fhir.utilities
- RHSA-2026:54776
Official advisory · high-confidence parse· fetched 11 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 11 days ago·verify at source
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