CVE-2026-55470

A flaw was found in HAPI FHIR, a Java implementation of the HL7 FHIR standard. The fix for a previous vulnerability CVE-2026-45367 was incomplete in the DSTU2 module. Specifically, the FHIRPathEngine.matches function in org.hl7.fhir.dstu2 did not include protection against regular expression...