CVE-2026-105667 J4Care dcm4che Missing Authentication for Critical Function
Remote attackers can reassign medical studies between patients by sending unauthenticated HL7 merge messages, compromising data integrity in dcm4chee-arc-light.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-105667?
CVE-2026-105667 is a high-severity missing authorization vulnerability in J4Care dcm4chee-arc-light, published on 16 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-306
Which versions are affected by CVE-2026-105667?
How do I fix CVE-2026-105667?
No fix has been published for CVE-2026-105667 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-105667 being exploited?
There is no known exploitation of CVE-2026-105667 in the wild and no public exploit code.