CVE-2026-45367
HIGHHAPI FHIR: ReDoS via FHIRPath matches()/replaceMatches() in FHIR Validator HTTP Endpoint
Title source: cnaDescription
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.
References (6)
Core 6
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-3653-68v6-rq57
X_Refsource_Misc x_refsource_misc
https://github.com/hapifhir/org.hl7.fhir.core/pull/2403
X_Refsource_Misc x_refsource_misc
https://github.com/hapifhir/org.hl7.fhir.core/pull/2463
X_Refsource_Misc x_refsource_misc
https://github.com/hapifhir/org.hl7.fhir.core/commit/275d015c680ce9f90cbe285596e50118e472bf24
X_Refsource_Misc x_refsource_misc
https://github.com/hapifhir/org.hl7.fhir.core/commit/e08982d2b6f6dcd6c670a762d9cf999179fbe4ed
X_Refsource_Misc x_refsource_misc
https://github.com/hapifhir/org.hl7.fhir.core/releases/tag/6.9.7
Scores
CVSS v3
7.5
EPSS
0.0049
EPSS Percentile
39.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-1333
Status
published
Products (1)
hapifhir/org.hl7.fhir.core
< 6.9.7
Published
Jul 16, 2026
Tracked Since
Jul 16, 2026