---
id: CVE-2026-105667
title: J4Care dcm4che Missing Authentication for Critical Function
summary: >-
  In the default configuration, the HL7 listener accepts ADT^A40 patient-merge
  messages without authenticating the sending application. A remote sender can
  reassign studies and related workflow records from one patient identity to
  another.…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N'
cvssSource: cna
cwe:
  - CWE-306
vendor: J4Care
product: dcm4chee-arc-light
affected:
  - dcm4chee-arc-light 5.35.1
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-16T15:05:51.316816Z'
published: '2026-10-16'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T15:20:18.221Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-105667'
references:
  - url: 'https://www.cisa.gov/news-events/ics-medical-advisories/icsma-26-288-02'
  - url: >-
      https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsma-26-288-02.json
tags:
  - cve.org
ingestedAt: '2026-10-16T15:11:47.125Z'
---

## Overview

In the default configuration, the HL7 listener accepts ADT^A40 patient-merge messages without authenticating the sending application. A remote sender can reassign studies and related workflow records from one patient identity to another. The archive's unmerge does not reverse this.

## Affected

- `dcm4chee-arc-light 5.35.1`

## Remediation

J4Care has provided a fix for the vulnerability. J4Care recommends users implement release 5.35.2 or later.