CRITICALVulnerability
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NVD CRITICAL: CVE-2026-34361 — HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare i...

Tuesday, March 31, 2026 at 05:16 PM UTC·Source: NIST NVD

Updated: Friday, April 3, 2026 at 01:53 PM UTC

Executive Summary

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

Analysis

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. CVSS Score: 9.3. Published: 2026-03-31T17:16:32.923.

Indicators of Compromise (1)

CVE (1)
CVE-2026-34361
NVDMITRE CVE
Source Attribution

Originally published by NIST NVD on Mar 31, 2026. Verified by: NIST.

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