CVE-2026-62296 HAPI FHIR: XHTML narrative parser unbounded recursion causes StackOverflow denial of service

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, raisi...

CVE-2026-62296

CVE-2026-62296 affects HAPI FHIR (Java). The vulnerable component is the XHTML parser (XhtmlParser.java) where, prior to 6.9.11, there is no maximum element nesting depth, allowing deeply nested text.div narratives to trigger unbounded recursion between parseElementInner() and parseElement(). Thi...