CVE-2026-34360
published 2026-03-31CVE-2026-34360: HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to version 6.9.4, the /loadIG HTTP endpoint in…
PriorityP335medium5.8CVSS 3.1
AVNACLPRNUINSCCLINAN
EPSS
0.24%
14.4th percentile
HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to version 6.9.4, the /loadIG HTTP endpoint in the FHIR Validator HTTP service accepts a user-supplied URL via JSON body and makes server-side HTTP requests to it without any hostname, scheme, or domain validation. An unauthenticated attacker with network access to the validator can probe internal network services, cloud metadata endpoints, and map network topology through error-based information leakage. With explore=true (the default for this code path), each request triggers multiple outbound HTTP calls, amplifying reconnaissance capability. This issue has been patched in version 6.9.4.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| hapifhir | hl7_fhir_core | < 6.9.4 | 6.9.4 |
| hapifhir | org.hl7.fhir.core | < 6.9.4 | 6.9.4 |
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GHSA
FHIR Validator: Unauthenticated Blind SSRF via /loadIG Endpoint Enables Internal Network Probing
ghsa·2026-03-30
CVE-2026-34360 [MEDIUM] CWE-918 FHIR Validator: Unauthenticated Blind SSRF via /loadIG Endpoint Enables Internal Network Probing
FHIR Validator: Unauthenticated Blind SSRF via /loadIG Endpoint Enables Internal Network Probing
## Summary
The `/loadIG` HTTP endpoint in the FHIR Validator HTTP service accepts a user-supplied URL via JSON body and makes server-side HTTP requests to it without any hostname, scheme, or domain validation. An unauthenticated attacker with network access to the validator can probe internal network services, cloud metadata endpoints, and map network topology through error-based information leakage. With `explore=true` (the default for this code path), each request triggers multiple outbound HTTP calls, amplifying reconnaissance capability.
## Details
**Root cause chain:**
1. `LoadIGHTTPHandler.handle()` reads the `ig` field from user-supplied JSON and passes it directly to `IgLoader.load
OSV
FHIR Validator: Unauthenticated Blind SSRF via /loadIG Endpoint Enables Internal Network Probing
osv·2026-03-30
CVE-2026-34360 [MEDIUM] FHIR Validator: Unauthenticated Blind SSRF via /loadIG Endpoint Enables Internal Network Probing
FHIR Validator: Unauthenticated Blind SSRF via /loadIG Endpoint Enables Internal Network Probing
## Summary
The `/loadIG` HTTP endpoint in the FHIR Validator HTTP service accepts a user-supplied URL via JSON body and makes server-side HTTP requests to it without any hostname, scheme, or domain validation. An unauthenticated attacker with network access to the validator can probe internal network services, cloud metadata endpoints, and map network topology through error-based information leakage. With `explore=true` (the default for this code path), each request triggers multiple outbound HTTP calls, amplifying reconnaissance capability.
## Details
**Root cause chain:**
1. `LoadIGHTTPHandler.handle()` reads the `ig` field from user-supplied JSON and passes it directly to `IgLoader.load
No detection rules found.
No public exploits indexed.
2026-03-31
Published