CVE-2026-45367
HAPI FHIR: ReDoS via FHIRPath matches()/replaceMatches() in FHIR Validator HTTP Endpoint
- State
- Published
- Severity
- 7.5 High
- Published
- Jul 16, 2026
- Updated
- Jul 18, 2026
- Reserved
- May 12, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | GitHub_M |
Weaknesses
- CWE-1333 Inefficient Regular Expression Complexity
Affected Products
| Product | Versions |
|---|---|
org.hl7.fhir.corehapifhir |
|
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
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