CVE-2026-45367
High
Description
HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to 6.9.7, the FHIRPathEngine implementation passes user-controlled regular expressions from matches(), matchesFull(), and replaceMatches() to Java regex operations without effective timeouts, allowing catastrophic backtracking and denial of service. This issue is fixed in version 6.9.7.
SeverityHigh
CVSS7.5
Exploit probability—
ProductCa.uhn.hapi.fhir:org.hl7.fhir.dstu2
PublishedJul 16, 2026
First seenJul 16, 2026
Weakness typeCWE-1333CWE-1333
How to fix
Update
- ca.uhn.hapi.fhir:org.hl7.fhir.dstu26.9.7 or later
- ca.uhn.hapi.fhir:org.hl7.fhir.dstu2016may6.9.7 or later
- ca.uhn.hapi.fhir:org.hl7.fhir.dstu36.9.7 or later
- ca.uhn.hapi.fhir:org.hl7.fhir.r46.9.7 or later
- ca.uhn.hapi.fhir:org.hl7.fhir.r4b6.9.7 or later
- ca.uhn.hapi.fhir:org.hl7.fhir.r56.9.7 or later
- ca.uhn.hapi.fhir:org.hl7.fhir.validation6.9.7 or later
- ca.uhn.hapi.fhir:org.hl7.fhir.validation.cli6.9.7 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| ca.uhn.hapi.fhir:org.hl7.fhir.dstu2Maven | v < 6.9.7 | 6.9.7 |
| ca.uhn.hapi.fhir:org.hl7.fhir.dstu2016mayMaven | v < 6.9.7 | 6.9.7 |
| ca.uhn.hapi.fhir:org.hl7.fhir.dstu3Maven | v < 6.9.7 | 6.9.7 |
| ca.uhn.hapi.fhir:org.hl7.fhir.r4Maven | v < 6.9.7 | 6.9.7 |
| ca.uhn.hapi.fhir:org.hl7.fhir.r4bMaven | v < 6.9.7 | 6.9.7 |
| ca.uhn.hapi.fhir:org.hl7.fhir.r5Maven | v < 6.9.7 | 6.9.7 |
| ca.uhn.hapi.fhir:org.hl7.fhir.validationMaven | v < 6.9.7 | 6.9.7 |
| ca.uhn.hapi.fhir:org.hl7.fhir.validation.cliMaven | v < 6.9.7 | 6.9.7 |
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