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TI-2026-75326 Aliases CVE-2026-105667

dcm4chee-arc-light accepts unauthenticated HL7 patient-merge messages

Priority MEDIUM 43CWE-306Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-306.

Summary

J4Care dcm4chee-arc-light from 5.35.1 before 5.35.2 is affected. In the default configuration, the HL7 listener accepts ADT^A40 patient-merge messages without authenticating the sending application, which is CWE-306. A remote, unauthenticated sender can reassign studies and related workflow records from one patient identity to another, and the archive's unmerge does not reverse this.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00239 15th percentileScored 2026-11-07
Fix Fixed dcm4chee-arc-light (J4Care): 5.35.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
J4Caredcm4chee-arc-light5.35.15.35.2Patch availableCNA
  • dcm4chee-arc-light VendorJ4Care Affected 5.35.1 Fixed in 5.35.2 Patch available CNA

Remediation

Update dcm4chee-arc-light to version 5.35.2, which fixes the flaw.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA dcm4chee-arc-light (J4Care) Fixed in 5.35.2

Timeline

  1. 2026-10-16 Threatist record created from CVE-2026-105667

References

Other 2

  • TI-2026-75325 J4Care dcm4che Missing Authentication for Critical Function CVSS 4.0CRITICAL 9.3
  • TI-2026-75334 Missing authorization in dcm4chee-arc-light enables object deletion CVSS 4.0HIGH 8.8
  • TI-2026-75328 Infinite loop in J4Care dcm4chee-arc-light JPEG parser CVSS 4.0HIGH 8.7
  • TI-2026-75324 J4Care dcm4che Loop with Unreachable Exit Condition CVSS 4.0HIGH 8.7
  • TI-2026-75323 Inefficient algorithm in J4Care dcm4chee-arc-light multipart parsing CVSS 4.0HIGH 8.7

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences