CVE-2026-62296
HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java.
Impact
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.
Affected products
| Product | Affected versions |
|---|---|
| Java. | before 6.9.11 |
Versions were read from the advisory text. No structured product data has been published for this record yet.