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CVE-2026-44036— Uncontrolled recursion in DCMTK xml2dcm allows denial of service

Quick assessment

Affected
OFFIS DCMTK
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 OFFIS DCMTK 3.7.0 版本的 XML 到 DICOM 转换器（dcmdata/libdcxml/xml2dcm.cc）中，DcmXMLParseHelper::parseDataSet() 与 DcmXMLParseHelper::parseSequence() 之间存在不受控制的相互递归问题。攻击者可通过构造包含深层嵌套的 sequence 和 item 元素的恶意 XML 文件，导致拒绝服务（栈溢出耗尽及进程崩溃）。受影响的功能包括 xml2dcm 工具，以及所有使用该代码将不受信任的 XML

CVSS 5.5 · Medium

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2026-44036

Vulnerability Information
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Vulnerability Title
Uncontrolled recursion in DCMTK xml2dcm allows denial of service
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的递归
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
OFFIS DCMTK 3.7.0 cpe:2.3:a:offis:dcmtk:3.7.0:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-44036

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III. Intelligence Information for CVE-2026-44036

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Other References for CVE-2026-44036 (2)

Same Patch Batch · OFFIS · 2026-10-08 · 7 CVEs total

CVE-2026-44031 7.5 HIGH Uncontrolled recursion in the DCMTK DICOM dataset parser allows unauthenticated remote den
CVE-2026-44037 5.5 MEDIUM Uncontrolled recursion in DCMTK JSON reader allows denial of service
CVE-2026-44035 5.5 MEDIUM Uncontrolled recursion in DCMTK DICOMDIR parsing allows denial of service
CVE-2026-44033 5.5 MEDIUM Uncontrolled recursion in the DCMTK bundled XML parser allows denial of service
CVE-2026-44038 4.4 MEDIUM Global buffer out-of-bounds read in DCMTK JPEG Huffman decoding
CVE-2026-44034 4.4 MEDIUM Heap out-of-bounds read in DCMTK RLE decodeFrame()

IV. Related Vulnerabilities

Same product: DCMTK
Same vendor: OFFIS
Same weakness: CWE-674

V. Comments for CVE-2026-44036

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