{"id":"CVE-2026-81875","title":"HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java","summary":"HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to version 6.9.12, SHCParser in org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/elementmodel/SHCParser.java can consume attacker…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-20","CWE-400","CWE-409"],"vendor":"hapifhir","product":"org.hl7.fhir.core","affected":["org.hl7.fhir.core < 6.9.12"],"published":"2026-09-16","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:16:48.207","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-81875","references":[{"url":"https://github.com/hapifhir/org.hl7.fhir.core/commit/fbb94216e0ad21ded75be77e5e20242ba194e83f","label":"security-advisories@github.com"},{"url":"https://github.com/hapifhir/org.hl7.fhir.core/pull/2493","label":"security-advisories@github.com"},{"url":"https://github.com/hapifhir/org.hl7.fhir.core/releases/tag/6.9.11","label":"security-advisories@github.com"},{"url":"https://github.com/hapifhir/org.hl7.fhir.core/releases/tag/6.9.12","label":"security-advisories@github.com"},{"url":"https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-3w98-rrpr-fprr","label":"security-advisories@github.com"},{"url":"https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-3w98-rrpr-fprr","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-81875"},{"url":"https://github.com/advisories/GHSA-3w98-rrpr-fprr"}],"tags":["nvd","cve.org","exploit-available","ghsa","maven"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-17T16:14:08.266567Z"},"ingestedAt":"2026-09-16T19:02:30.725Z","aliases":["GHSA-3w98-rrpr-fprr"],"ecosystem":"maven","patched":["ca.uhn.hapi.fhir:org.hl7.fhir.r5 6.9.12","ca.uhn.hapi.fhir:org.hl7.fhir.validation 6.9.12"],"epss":0.0063,"epssPercentile":0.4848,"slug":"CVE-2026-81875","body":"## Overview\n\nHAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to version 6.9.12, SHCParser in org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/elementmodel/SHCParser.java can consume attacker-controlled Smart Health Card JWT content whose header contains zip: \"DEF\" and whose small raw-DEFLATE payload expands to a very large value. SHCParser.decodeJWT() passes the decoded payload to SHCParser.inflate(), which accumulates all decompressed bytes in a ByteArrayOutputStream without an output-size limit before JSON parsing, and SHCParser.decompress() contains the same unbounded pattern. An application or validator service that accepts attacker-supplied SHC content can therefore suffer excessive heap allocation, severe garbage-collection pressure, request failure, process instability, or process termination. This issue is fixed in version 6.9.12.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-81875)\n\nAffected packages:\n\n- `ca.uhn.hapi.fhir:org.hl7.fhir.r5 <= 6.9.11`\n- `ca.uhn.hapi.fhir:org.hl7.fhir.validation <= 6.9.11`\n- `ca.uhn.hapi.fhir:org.hl7.fhir.validation.cli <= 5.0.0`\n\nPatched in:\n\n- `ca.uhn.hapi.fhir:org.hl7.fhir.r5 6.9.12`\n- `ca.uhn.hapi.fhir:org.hl7.fhir.validation 6.9.12`\n\nSource: https://github.com/advisories/GHSA-3w98-rrpr-fprr","depth":"midnight","depthScore":53,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":206287,"id":"CVE-2026-81875","ts":1789662166908,"field":"exploit_available","old":"false","new":"true"}]}