CVE-2026-44037

MEDIUM 5.5

Uncontrolled recursion in DCMTK JSON reader allows denial of service

CVSS Score

5.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-674
Vendor	offis
Product	dcmtk
Published	Oct 8, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

OFFIS / DCMTK

3.7.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

support.dcmtk.org: https://support.dcmtk.org/redmine/issues/1225 github.com: https://github.com/DCMTK/dcmtk/commit/cf955e64c35a1e07ba10698f639d5dcdec53b9d7

Credits

Arjun Basnet from Securin