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9.3 Critical

CVE-2026-34361 HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java

Description

HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to version 6.9.4, the FHIR Validator HTTP service exposes an unauthenticated "/loadIG" endpoint that makes outbound HTTP requests to attacker-controlled URLs. Combined with a startsWith() URL prefix matching flaw in the credential provider (ManagedWebAccessUtils.getServer()), an attacker can steal authentication tokens (Bearer, Basic, API keys) configured for legitimate FHIR servers by registering a domain that prefix-matches a configured server URL. This issue has been patched in version 6.9.4.

Affected products and versions

Product Affected versions Fixed in
org.hl7.fhir.core 6.9 earliest → < 6.9.4 6.9.4

References

Timeline

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The 15 CVEs of org.hl7.fhir.core →
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