CVE-2026-34359

HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to version 6.9.4, ManagedWebAccessUtils.getServer() uses String.startsWith() to match request URLs against configured server URLs for authentication credential dispatch. Because configured server URLs (e.g., http://tx.fhir.org) lack a trailing slash or host boundary check, an attacker-controlled domain like http://tx.fhir.org.attacker.com matches the prefix and receives Bearer tokens, Basic auth credentials, or API keys when the HTTP client follows a redirect to that domain. This issue has been patched in version 6.9.4.

CVSS v3 7.4 HIGH

7.4^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-fgv2-4q4g-wc35	Exploit Vendor Advisory
https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-fgv2-4q4g-wc35	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:hapifhir:hl7_fhir_core:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-31 17:16

Updated : 2026-07-24 20:10

NVD link : CVE-2026-34359

Mitre link : CVE-2026-34359

CVE.ORG link : CVE-2026-34359

JSON object : View

Products Affected

hapifhir

hl7_fhir_core

CWE

CWE-346

Origin Validation Error

{"id": "CVE-2026-34359", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-34359", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-03-31T18:39:23.690008Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.4, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 2.2}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.1, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "hapifhir", "product": "org.hl7.fhir.core", "versions": [{"status": "affected", "version": "< 6.9.4"}]}]}], "published": "2026-03-31T17:16:31.937", "references": [{"url": "https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-fgv2-4q4g-wc35", "tags": ["Exploit", "Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-fgv2-4q4g-wc35", "tags": ["Exploit", "Vendor Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-346"}]}], "descriptions": [{"lang": "en", "value": "HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to version 6.9.4, ManagedWebAccessUtils.getServer() uses String.startsWith() to match request URLs against configured server URLs for authentication credential dispatch. Because configured server URLs (e.g., http://tx.fhir.org) lack a trailing slash or host boundary check, an attacker-controlled domain like http://tx.fhir.org.attacker.com matches the prefix and receives Bearer tokens, Basic auth credentials, or API keys when the HTTP client follows a redirect to that domain. This issue has been patched in version 6.9.4."}, {"lang": "es", "value": "HAPI FHIR es una implementaci\u00f3n completa del est\u00e1ndar HL7 FHIR para la interoperabilidad en el sector de la salud en Java. Antes de la versi\u00f3n 6.9.4, ManagedWebAccessUtils.getServer() utiliza String.startsWith() para hacer coincidir las URL de solicitud con las URL de servidor configuradas para el env\u00edo de credenciales de autenticaci\u00f3n. Debido a que las URL de servidor configuradas (por ejemplo, http://tx.fhir.org) carecen de una barra final o de una verificaci\u00f3n de l\u00edmite de host, un dominio controlado por un atacante como http://tx.fhir.org.attacker.com coincide con el prefijo y recibe tokens Bearer, credenciales de autenticaci\u00f3n Basic o claves API cuando el cliente HTTP sigue una redirecci\u00f3n a ese dominio. Este problema ha sido parcheado en la versi\u00f3n 6.9.4."}], "lastModified": "2026-07-24T20:10:00.147", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:hapifhir:hl7_fhir_core:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "03C38881-A545-4EB5-BF3A-E15EF3D0F995", "versionEndExcluding": "6.9.4"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}