---
id: CVE-2026-62296
title: >-
  HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare
  interoperability in Java
summary: >-
  HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare
  interoperability in Java. Prior to 6.9.11, XhtmlParser.java imposes no maximum
  element nesting depth, so a deeply nested text.div narrative triggers
  unbounded…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-20
  - CWE-400
  - CWE-674
  - CWE-770
published: '2026-08-07'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T21:02:22.660'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-62296'
references:
  - url: >-
      https://github.com/hapifhir/org.hl7.fhir.core/commit/396f447500407693d6ae1e64db59782862ca7506
    label: security-advisories@github.com
  - url: >-
      https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-5v24-q6x8-hc38
    label: security-advisories@github.com
  - url: >-
      https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-5v24-q6x8-hc38
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-62296.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-62296'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2512644'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-62296'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-62296'
tags:
  - nvd
  - csaf
  - vex
  - red-hat
epss: 0.00488
epssPercentile: 0.39405
ingestedAt: '2026-09-09T21:22:45.524Z'
vendor: Red Hat
product: Red Hat build of Apache Camel 4 for Quarkus 3
affected:
  - build_of_apache_camel_4_for_quarkus 3
  - jboss_enterprise_application_platform_expansion_pack
---

## Overview

HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to 6.9.11, XhtmlParser.java imposes no maximum element nesting depth, so a deeply nested text.div narrative triggers unbounded recursion between parseElementInner() and parseElement(), raising a StackOverflowError. An attacker who can submit FHIR resources containing such narratives can thus crash a parsing or validation worker thread, affecting validator services and any application that parses attacker-supplied FHIR JSON or XML. This issue is fixed in version 6.9.11.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Important · affected: Red Hat build of Apache Camel 4 for Quarkus 3, Red Hat JBoss Enterprise Application Platform Expansion Pack · no fix planned: Red Hat build of Apache Camel 4 for Quarkus 3, Red Hat JBoss Enterprise Application Platform Expansion Pack · updated 2026-09-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-62296.json)