{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-81875", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-08-27T17:48:42.121Z", "datePublished": "2026-09-16T18:44:47.591Z", "dateUpdated": "2026-09-16T18:44:47.591Z"}, "containers": {"cna": {"title": "HAPI FHIR: SHCParser unbounded DEFLATE decompression causes 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-409", "lang": "en", "description": "CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)", "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-3w98-rrpr-fprr", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-3w98-rrpr-fprr"}, {"name": "https://github.com/hapifhir/org.hl7.fhir.core/pull/2493", "tags": ["x_refsource_MISC"], "url": "https://github.com/hapifhir/org.hl7.fhir.core/pull/2493"}, {"name": "https://github.com/hapifhir/org.hl7.fhir.core/commit/fbb94216e0ad21ded75be77e5e20242ba194e83f", "tags": ["x_refsource_MISC"], "url": "https://github.com/hapifhir/org.hl7.fhir.core/commit/fbb94216e0ad21ded75be77e5e20242ba194e83f"}, {"name": "https://github.com/hapifhir/org.hl7.fhir.core/releases/tag/6.9.11", "tags": ["x_refsource_MISC"], "url": "https://github.com/hapifhir/org.hl7.fhir.core/releases/tag/6.9.11"}, {"name": "https://github.com/hapifhir/org.hl7.fhir.core/releases/tag/6.9.12", "tags": ["x_refsource_MISC"], "url": "https://github.com/hapifhir/org.hl7.fhir.core/releases/tag/6.9.12"}], "affected": [{"vendor": "hapifhir", "product": "org.hl7.fhir.core", "versions": [{"version": "< 6.9.12", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-16T18:44:47.591Z"}, "descriptions": [{"lang": "en", "value": "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-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."}], "source": {"advisory": "GHSA-3w98-rrpr-fprr", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "org.hl7.fhir.core", "vendor": "hapifhir", "versions": [{"status": "affected", "version": "< 6.9.12"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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-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."}], "id": "CVE-2026-81875", "lastModified": "2026-09-16T19:17:44.250", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-09-16T19:17:44.250", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/hapifhir/org.hl7.fhir.core/commit/fbb94216e0ad21ded75be77e5e20242ba194e83f"}, {"source": "security-advisories@github.com", "url": "https://github.com/hapifhir/org.hl7.fhir.core/pull/2493"}, {"source": "security-advisories@github.com", "url": "https://github.com/hapifhir/org.hl7.fhir.core/releases/tag/6.9.11"}, {"source": "security-advisories@github.com", "url": "https://github.com/hapifhir/org.hl7.fhir.core/releases/tag/6.9.12"}, {"source": "security-advisories@github.com", "url": "https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-3w98-rrpr-fprr"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}, {"lang": "en", "value": "CWE-400"}, {"lang": "en", "value": "CWE-409"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}