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.
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History
Fri, 07 Aug 2026 20:15:00 +0000
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| Description | 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. | |
| Title | HAPI FHIR: XHTML narrative parser unbounded recursion causes StackOverflow denial of service | |
| Weaknesses | CWE-20 CWE-400 CWE-674 |
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cvssV3_1
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MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-08-07T20:03:17.024Z
Reserved: 2026-07-13T18:37:08.488Z
Link: CVE-2026-62296
Vulnrichment
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NVD
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Redhat
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OpenCVE Enrichment
Updated: 2026-08-07T21:30:18Z