CVE-2026-34361

CRITICAL EPSS 21.6%
Published Mar 31, 20263mo ago · Modified Jun 17, 20261w ago
9.3 CVSS 3.1
Critical
Find Similar
Published Mar 31, 2026 3mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
9.3
Exploitability
3.9
Impact
4.7
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Changed
Confidentiality High
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
21.6% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 1

CWE-552

Affected Products 1

VendorProductVersionRange
hapifhirhl7_fhir_core* <6.9.4

References 1

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

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.