Paper/Archive/CVE-2026-34361

CVE-2026-34361

hapifhir org.hl7.fhir.core — HAPI FHIR: Unauthenticated SSRF via /loadIG Chains with startsWith() Credential Leak for Authentication Token Theft

EPSS 0.3%public exploit CVSS 9.3

critical.is priorityof 100

CVSS 9.3 (CNA, NVD agree)9.3 / 10 × 3027.9 Not in CISA KEV+300.0 EPSS percentile 23.3.233 × 204.7 Exploit: SSVC poc+1010.0 SSVC exploitation: poc+100.0

Description · from the CVE record

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

ProductAffectedFixed inSource

org.hl7.fhir.core< 6.9.4–CNA

Scores by source

GitHub_M (CNA)9.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N

NVD9.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N

CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: partial

References

refgithub.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-vr79-8m62-wh98