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CVE-2026-34361— HAPI FHIR: Unauthenticated SSRF via /loadIG Chains with startsWith() Credential Leak for Authentication Token Theft

Quick assessment

Affected
hapifhir org.hl7.fhir.core
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

HAPI FHIR是HAPI FHIR开源的一个Java编写的 HL7 FHIR API。 HAPI FHIR 6.9.4之前版本存在安全漏洞，该漏洞源于FHIR Validator HTTP服务暴露了未经身份验证的/loadIG端点，且凭证提供程序存在URL前缀匹配缺陷，可能导致身份验证令牌被盗。

CVSS 9.3 · Critical EPSS 0.42% · P36
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I. Basic Information for CVE-2026-34361

Vulnerability Information
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Vulnerability Title
HAPI FHIR: Unauthenticated SSRF via /loadIG Chains with startsWith() Credential Leak for Authentication Token Theft
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对外部实体的文件或目录可访问
Source: CVE Program / CVE List V5
Vulnerability Title
HAPI FHIR 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
HAPI FHIR是HAPI FHIR开源的一个Java编写的 HL7 FHIR API。 HAPI FHIR 6.9.4之前版本存在安全漏洞，该漏洞源于FHIR Validator HTTP服务暴露了未经身份验证的/loadIG端点，且凭证提供程序存在URL前缀匹配缺陷，可能导致身份验证令牌被盗。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
hapifhir org.hl7.fhir.core < 6.9.4 -

II. Public POCs for CVE-2026-34361

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III. Intelligence Information for CVE-2026-34361

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Vendor Advisories for CVE-2026-34361 (1)

Same Patch Batch · hapifhir · 2026-03-31 · 3 CVEs total

CVE-2026-34359 7.4 HIGH HAPI FHIR: Authentication Credential Leakage via Improper URL Prefix Matching on HTTP Redi
CVE-2026-34360 5.8 MEDIUM HAPI FHIR: Unauthenticated Blind SSRF via /loadIG Endpoint Enables Internal Network Probin

IV. Related Vulnerabilities

Same product: org.hl7.fhir.core
Same vendor: hapifhir
Same weakness: CWE-552

V. Comments for CVE-2026-34361

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