CVE-2026-34361HAPI FHIR: Unauthenticated SSRF via /loadIG Chains with startsWith() Credential Leak for Authentication Token Theft
Updated under an hour ago ()
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It affects hapifhir org.hl7.fhir.core and 1 other product. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.42%, higher than 35% of scored CVEs.
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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
- 9.3 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
- Weakness (CWE)
- CWE-552
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.42% (percentile 35)
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Mar 31, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
hapifhir org.hl7.fhir.core hapifhir:org.hl7.fhir.core (from the name) | before 6.9.4 | CNA record |
hapifhir hl7_fhir_core hapifhir:hl7_fhir_core | before 6.9.4 | NVD |
References
- https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-vr79-8m62-wh98x-refsource-confirm, exploit, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.