What is CVE-2026-105667?

CVE-2026-105667 is a high-severity vulnerability in J4care Dcm4chee-Arc-Light, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2026-10-16.

How severe is CVE-2026-105667?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in J4care Dcm4chee-Arc-Light

CVE-2026-105667

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.

Vulnerability class: Broken Authentication

Published 2026-10-16 · last modified 2026-10-16.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

J4care Dcm4chee-Arc-Light — versions 5.35.1

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

Frequently asked questions

What is CVE-2026-105667?: CVE-2026-105667 is a high-severity vulnerability in J4care Dcm4chee-Arc-Light, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2026-10-16.
How severe is CVE-2026-105667?: High severity. CVSS v3 base score is 7.5 out of 10.