High severity7.5NVD Advisory· Published Jul 8, 2026· Updated Jul 16, 2026
CVE-2026-55470
CVE-2026-55470
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
ca.uhn.hapi.fhir:org.hl7.fhir.dstu2Maven | < 6.9.10 | 6.9.10 |
ca.uhn.hapi.fhir:org.hl7.fhir.convertorsMaven | < 6.9.10 | 6.9.10 |
ca.uhn.hapi.fhir:org.hl7.fhir.validationMaven | < 6.9.10 | 6.9.10 |
ca.uhn.hapi.fhir:org.hl7.fhir.validation.cliMaven | < 6.9.10 | 6.9.10 |
Affected products
6- ghsa-coords4 versionspkg:maven/ca.uhn.hapi.fhir/org.hl7.fhir.convertorspkg:maven/ca.uhn.hapi.fhir/org.hl7.fhir.dstu2pkg:maven/ca.uhn.hapi.fhir/org.hl7.fhir.validationpkg:maven/ca.uhn.hapi.fhir/org.hl7.fhir.validation.cli
< 6.9.10+ 3 more
- (no CPE)range: < 6.9.10
- (no CPE)range: < 6.9.10
- (no CPE)range: < 6.9.10
- (no CPE)range: < 6.9.10
Patches
Vulnerability mechanics
References
4- github.com/hapifhir/org.hl7.fhir.core/commit/56376f7986222626af061ca7fc27ee1ab030e590nvdPatch
- github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-fxj4-p9xp-37v5nvdExploitThird Party AdvisoryWEB
- github.com/advisories/GHSA-fxj4-p9xp-37v5ghsaADVISORY
- github.com/hapifhir/org.hl7.fhir.core/releases/tag/6.9.10nvdRelease Notes
News mentions
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