EUVD-2026-80998

HAPI FHIR: SHCParser DEFLATE infinite loop causes denial of service...

Improper Handling of Highly Compressed Data (Data Amplification)

Overview Affected versions of this package are vulnerable to Improper Handling of Highly Compressed Data Data Amplification in the inflate payload processing path. An attacker can exhaust memory or trigger severe garbage-collection pressure by supplying a Smart Health Card JWT with a zip":"DEF"...

CVE-2026-81875 HAPI FHIR: SHCParser unbounded DEFLATE decompression causes denial of service

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...

PT-2026-93917

Name of the Vulnerable Software and Affected Versions HAPI FHIR versions prior to 6.9.12 Description A denial-of-service issue exists when processing Smart Health Card SHC JWT content. If the JWT header contains zip: "DEF" and the raw-DEFLATE payload is empty or truncated, the SHCParser.inflate a...

PT-2026-93902

Name of the Vulnerable Software and Affected Versions HAPI FHIR versions prior to 6.9.12 Description The SHCParser component in org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/elementmodel/SHCParser.java fails to limit the size of decompressed Smart Health Card JWT payloads. When a JWT header...

CVE-2026-81876: Improper Input Validation

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 enter an infinite loop while processing attacker-controlled Smart Health Car...