Bug 2498308 (CVE-2026-55470) - CVE-2026-55470 ca.uhn.hapi.fhir/org.hl7.fhir.dstu2: ca.uhn.hapi.fhir/org.hl7.fhir.convertors: ca.uhn.hapi.fhir/org.hl7.fhir.validation: ca.uhn.hapi.fhir/org.hl7.fhir.validation.cli: HAPI FHIR: Denial of Service via Regular Expression Backtracking in D ...
Summary: CVE-2026-55470 ca.uhn.hapi.fhir/org.hl7.fhir.dstu2: ca.uhn.hapi.fhir/org.hl7....
Keywords:
Status: NEW
Alias: CVE-2026-55470
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-08 22:03 UTC by OSIDB Bzimport
Modified: 2026-08-13 23:28 UTC (History)
22 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:54776 0 None None None 2026-08-13 23:28:35 UTC

Description OSIDB Bzimport 2026-07-08 22:03:14 UTC 
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.
Comment 3 errata-xmlrpc 2026-08-13 23:28:34 UTC 
This issue has been addressed in the following products:

  Red Hat Build of Apache Camel 4.18 for Quarkus 3.33

Via RHSA-2026:54776 https://access.redhat.com/errata/RHSA-2026:54776
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