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TI-2026-69431 Aliases CVE-2026-44037GHSA-w8m4-mhcj-8r75

DCMTK JSON reader uncontrolled recursion allows denial of service

Priority LOW 29CWE-674Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-674.

Summary

OFFIS DCMTK 3.7.0 is affected by uncontrolled recursion in the DICOM JSON reader, where mutual recursion between DcmJSONReader::parseDataSet(), DcmJSONReader::parseElement() and DcmJSONReader::parseSequence() has no depth limit (CWE-674). An unauthenticated local attacker can cause a denial of service by supplying a crafted DICOM JSON document with deeply nested sequence values, which exhausts the stack and crashes the process. The json2dcm tool and any service that converts untrusted DICOM JSON, such as DICOMweb payloads, are affected. Exploitation requires user interaction.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

Uncontrolled mutual recursion between DcmJSONReader::parseDataSet(), DcmJSONReader::parseElement() and DcmJSONReader::parseSequence() in dcmdata/libsrc/dcjsonrd.cc of OFFIS DCMTK 3.7.0 allows an attacker to cause a denial of service (stack exhaustion and process crash) via a crafted DICOM JSON document with deeply nested sequence (SQ) values. The json2dcm tool and any service that converts untrusted DICOM JSON (for example, DICOMweb payloads) with this reader are affected. The issue is fixed in commit cf955e64c35a1e07ba10698f639d5dcdec53b9d7.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00105 1st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
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
OFFISDCMTK3.7.0—No fix listedCNA
  • DCMTK VendorOFFIS Affected 3.7.0 Fixed in — No fix listed CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:offis:dcmtk:3.7.0:*:*:*:*:*:*:*3.7.0—OFFIS
  • cpe:2.3:a:offis:dcmtk:3.7.0:*:*:*:*:*:*:* Versions 3.7.0 — ·OFFIS

Remediation

The sources list no fixed version for DCMTK. The issue is fixed in commit cf955e64c35a1e07ba10698f639d5dcdec53b9d7.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-08 Threatist record created from CVE-2026-44037
  2. 2026-10-08 Alias added: GHSA-w8m4-mhcj-8r75
  3. 2026-10-09 Affected versions changed · Red Hat
  4. 2026-10-09 CVSS score added · Red Hat

References

Patch 1

Advisory 1

  • TI-2026-10943 OFFIS DCMTK ofxml.cc parseFile heap-based overflow CVSS 4.0MEDIUM 5.3
  • TI-2025-08922 DCMTK dcm2img diybrpxt.h memory corruption CVSS 4.0MEDIUM 4.8
  • TI-2022-04568 DCMTK dcmqrscp dcmqrcnf.cc readPeerList null pointer dereference CVSS 4.0MEDIUM 4.8
  • TI-2020-18990 DCMTK dcmqrscp parseQuota stack-based overflow CVSS 4.0MEDIUM 4.8
  • TI-2024-22823 dcmnet in DCMTK before 3.6.9 has a segmentation fault via an invalid DIMSE message. CVSS 3.1MEDIUM 4.3
  • TI-2019-16028 Out-of-bounds write in OFFIS.de DCMTK CVSS 3.1CRITICAL 9.8
See all 35 →

Sources

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