CVE-2026-45367

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.

Score

CVSS 3.1 7.5 High

Status

Awaiting Analysis - security-advisories@github.com

Published

2026-07-16

Last modified

2026-10-24

Weaknesses

CWE-1333

Affected products

• Org.hl7.fhir.core (Hapifhir)

References

• https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-3653-68v6-rq57
• https://github.com/hapifhir/org.hl7.fhir.core/pull/2403
• https://github.com/hapifhir/org.hl7.fhir.core/pull/2463
• https://github.com/hapifhir/org.hl7.fhir.core/commit/275d015c680ce9f90cbe285596e50118e472bf24
• https://github.com/hapifhir/org.hl7.fhir.core/commit/e08982d2b6f6dcd6c670a762d9cf999179fbe4ed
• https://github.com/hapifhir/org.hl7.fhir.core/releases/tag/6.9.7