Bug 2547947 (CVE-2026-44036)

Summary: CVE-2026-44036 dcmtk: dcmtk: Denial of Service via uncontrolled recursion during XML parsing
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in DCMTK's XML-to-DICOM converter. An attacker can exploit this vulnerability by supplying a crafted XML file containing deeply nested elements. When parsed, this input triggers uncontrolled recursion that exhausts stack memory and crashes the application, resulting in a Denial of Service (DoS).
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Bug Depends On: 2547996, 2547997    
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Description OSIDB Bzimport 2026-10-08 13:02:48 UTC 
Uncontrolled mutual recursion between DcmXMLParseHelper::parseDataSet() and DcmXMLParseHelper::parseSequence() in the XML-to-DICOM converter (dcmdata/libdcxml/xml2dcm.cc) of OFFIS DCMTK 3.7.0 allows an attacker to cause a denial of service (stack exhaustion and process crash) via a crafted XML file with deeply nested sequence and item elements. The xml2dcm tool and any service that converts untrusted XML to DICOM with this code are affected. The issue is fixed in commit 87f256d73e30656a822bf7d76d1cf1d9bb693954.