> CVE-2026-55470 [HIGH]

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PUBLISHED
2026-07-08 22:17
MODIFIED
2026-07-08 22:17
CVSS_SCORE V3
7.5
EPSS (Prob. Exploit)
0.68%
Top 48.1%
DATA SOURCES:
NVD đź”— 2026-07-08 CWE MITRE đź”— 2026-11-01 FIRST EPSS đź”— 2026-10-25 GITHUB đź”— 2026-11-05 OSV đź”— 2026-09-20

> 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.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EXPLOITABILITY
3.9
IMPACT
3.6

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
None (N)
Aucune divulgation d'informations
I (Impact Intégrité)
Integrity Impact
None (N)
Aucune modification de données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
None
Aucune divulgation d'informations
Intégrité
None
Aucune modification de données possible
Disponibilité
High
Interruption totale du service possible

> WEAKNESSES

CWE-1333

> CWE DETAILED DESCRIPTIONS

CWE-1333: Inefficient Regular Expression Complexity - The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: Red Hat Build of Apache Camel 4.18 for Quarkus 3.33 update is now available (RHBQ 3.33.3.GA)
An update for Red Hat Build of Apache Camel 4.18 for Quarkus 3.33 update is now available (RHBQ 3.33.3.GA). The purpose of this text-only errata is to inform you about the enhancements that improve yo...

> GITHUB SECURITY ADVISORY

GHSA-fxj4-p9xp-37v5 HIGH

HAPI FHIR: Incomplete fix for CVE-2026-45367: DSTU2 FHIRPathEngine.matches() missing RegexTimeout protection allows ReDoS

AFFECTED PACKAGES:
MAVEN / ca.uhn.hapi.fhir:org.hl7.fhir.validation.cli
<= 6.9.9
Fixed in: 6.9.10
MAVEN / ca.uhn.hapi.fhir:org.hl7.fhir.validation
<= 6.9.9
Fixed in: 6.9.10
MAVEN / ca.uhn.hapi.fhir:org.hl7.fhir.convertors
<= 6.9.9
Fixed in: 6.9.10
MAVEN / ca.uhn.hapi.fhir:org.hl7.fhir.dstu2
<= 6.9.9
Fixed in: 6.9.10

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

HAPI FHIR: DSTU2 FHIRPathEngine.matches() missing RegexTimeout protection allows ReDoS

AFFECTED PACKAGES:
Unknown / Unknown
13 versions affected
ALIASES:
GHSA-fxj4-p9xp-37v5

> HISTORIQUE DES MODIFICATIONS

Première apparition
08/07/2026 22:17
Source: NVD
đź“Š ENRICHISSEMENT 01/08/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-1333: Inefficient Regular Expression Complexity - The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.
Total des modifications: 1 Dernière mise à jour: 3 months ago

> REFERENCES

https://github.com/hapifhir/org.hl7.fhir.core/commit/56376f7986222626af061ca7fc2...
https://github.com/hapifhir/org.hl7.fhir.core/releases/tag/6.9.10
https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-fxj4-p9xp...
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