Description
HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to 6.9.10, the fix for CVE-2026-45367 incompletely patched the DSTU2 module, leaving FHIRPathEngine.matches() in org.hl7.fhir.dstu2/utils/FHIRPathEngine.java to call raw String.matches(sw) without RegexTimeout protection while replaceMatches() was updated, allowing an unauthenticated attacker to trigger catastrophic regex backtracking and exhaust server CPU. This issue is fixed in version 6.9.10.
Problem types
CWE-1333: Inefficient Regular Expression Complexity
Product status
References
github.com/...r.core/security/advisories/GHSA-fxj4-p9xp-37v5
github.com/...r.core/security/advisories/GHSA-fxj4-p9xp-37v5
github.com/...ommit/56376f7986222626af061ca7fc27ee1ab030e590
github.com/hapifhir/org.hl7.fhir.core/releases/tag/6.9.10