CVE-2026-62296
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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 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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| hapifhir | org.hl7.fhir.core | < 6.9.11 | affected |
| hapifhir | ca.uhn.hapi.fhir:org.hl7.fhir.r5 | < 6.9.11 | affected |
| hapifhir | ca.uhn.hapi.fhir:org.hl7.fhir.utilities | < 6.9.11 | affected |
| hapifhir | ca.uhn.hapi.fhir:org.hl7.fhir.validation | < 6.9.11 | affected |
| hapifhir | ca.uhn.hapi.fhir:org.hl7.fhir.validation.cli | < 6.9.11 | affected |
Weaknesses
- CWE-20: CWE-20: Improper Input Validation
- CWE-400: CWE-400: Uncontrolled Resource Consumption
- CWE-674: CWE-674: Uncontrolled Recursion
References
- https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-5v24-q6x8-hc38
- https://github.com/hapifhir/org.hl7.fhir.core/commit/396f447500407693d6ae1e64db59782862ca7506
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