CVE-2026-34361

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 v3 9.3 CRITICAL

9.3^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 4.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-vr79-8m62-wh98	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:hapifhir:hl7_fhir_core:*:*:*:*:*:*:*:*

History

03 Apr 2026, 12:56

Type	Values Removed	Values Added
References	~~() https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-vr79-8m62-wh98 -~~	() https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-vr79-8m62-wh98 - Exploit, Vendor Advisory
First Time		Hapifhir hl7 Fhir Core Hapifhir
CPE		cpe:2.3:a:hapifhir:hl7_fhir_core::::::::

31 Mar 2026, 17:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-03-31 17:16

Updated : 2026-04-03 12:56

NVD link : CVE-2026-34361

Mitre link : CVE-2026-34361

CVE.ORG link : CVE-2026-34361

JSON object : View

Products Affected

hapifhir

hl7_fhir_core

CWE

CWE-552

Files or Directories Accessible to External Parties

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