{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-62296","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-07-13T18:37:08.488Z","datePublished":"2026-08-07T20:03:17.024Z","dateUpdated":"2026-08-10T13:29:55.958Z"},"containers":{"cna":{"title":"HAPI FHIR: XHTML narrative parser unbounded recursion causes StackOverflow denial of service","problemTypes":[{"descriptions":[{"cweId":"CWE-20","lang":"en","description":"CWE-20: Improper Input Validation","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-400","lang":"en","description":"CWE-400: Uncontrolled Resource Consumption","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-674","lang":"en","description":"CWE-674: Uncontrolled Recursion","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"references":[{"name":"https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-5v24-q6x8-hc38","tags":["x_refsource_CONFIRM"],"url":"https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-5v24-q6x8-hc38"},{"name":"https://github.com/hapifhir/org.hl7.fhir.core/commit/396f447500407693d6ae1e64db59782862ca7506","tags":["x_refsource_MISC"],"url":"https://github.com/hapifhir/org.hl7.fhir.core/commit/396f447500407693d6ae1e64db59782862ca7506"}],"affected":[{"vendor":"hapifhir","product":"org.hl7.fhir.core","versions":[{"version":"< 6.9.11","status":"affected"}]},{"vendor":"hapifhir","product":"ca.uhn.hapi.fhir:org.hl7.fhir.r5","versions":[{"version":"< 6.9.11","status":"affected"}]},{"vendor":"hapifhir","product":"ca.uhn.hapi.fhir:org.hl7.fhir.utilities","versions":[{"version":"< 6.9.11","status":"affected"}]},{"vendor":"hapifhir","product":"ca.uhn.hapi.fhir:org.hl7.fhir.validation","versions":[{"version":"< 6.9.11","status":"affected"}]},{"vendor":"hapifhir","product":"ca.uhn.hapi.fhir:org.hl7.fhir.validation.cli","versions":[{"version":"< 6.9.11","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-08-07T20:03:17.024Z"},"descriptions":[{"lang":"en","value":"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."}],"source":{"advisory":"GHSA-5v24-q6x8-hc38","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-5v24-q6x8-hc38","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-10T13:29:32.888412Z","id":"CVE-2026-62296","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-10T13:29:55.958Z"}}]}}