CVE-2026-55470

HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to 6.9.10, the fix for CVE-2026-45367 incompletely patched the DSTU2 module, leaving FHIRPathEngine.matches() in org.hl7.fhir.dstu2/utils/FHIRPathEngine.java to call raw String.matches(sw) without RegexTimeout protection while replaceMatches() was updated, allowing an unauthenticated attacker to trigger catastrophic regex backtracking and exhaust server CPU. This issue is fixed in version 6.9.10.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/hapifhir/org.hl7.fhir.core/commit/56376f7986222626af061ca7fc27ee1ab030e590	Patch
https://github.com/hapifhir/org.hl7.fhir.core/releases/tag/6.9.10	Release Notes
https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-fxj4-p9xp-37v5	Exploit Third Party Advisory
https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-fxj4-p9xp-37v5	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

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

History

No history.

Information

Published : 2026-07-08 22:17

Updated : 2026-07-16 16:31

NVD link : CVE-2026-55470

Mitre link : CVE-2026-55470

CVE.ORG link : CVE-2026-55470

JSON object : View

Products Affected

hapifhir

hl7_fhir_core

CWE

CWE-1333

Inefficient Regular Expression Complexity

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