CVE-2026-34361CRITICAL 9.3EPSS p21.4%

CVE-2026-34361CVE-2026-34361

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.

Scoring

CVSS 3.19.3 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
EPSS0.30% probability of exploitation · percentile 21.4% · 2026-06-18T12:00:27Z
Published2026-03-31
Last modified2026-04-03

Underlying weaknesses· 1

CWE-552

References

  1. https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-vr79-8m62-wh98

1

TypeTargetConfidenceTier
WeaknessFiles or Directories Accessible to External Partiescwe-5520%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.