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CVE-2026-44033— Uncontrolled recursion in the DCMTK bundled XML parser 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 自带的 XML 解析器（位于 ofstd/libsrc/ofxml.cc）中，XMLNode::ParseXMLElement() 和 XMLNode::emptyTheNode() 存在不受控制的递归问题。攻击者可以通过构造包含深度嵌套元素的恶意 XML 文档，导致拒绝服务（栈溢出和进程崩溃）。该解析器可通过 dcmencap 在封装 CDA 文档时调用，也可通过任何对不可信输入调用 OFXMLParser::parseFile() 或 OFXMLParser::parse

CVSS 5.5 · Medium

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2026-44033

Vulnerability Information
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Vulnerability Title
Uncontrolled recursion in the DCMTK bundled XML parser allows denial of service
Source: CVE Program / CVE List V5
Vulnerability Description
Uncontrolled recursion in XMLNode::ParseXMLElement() and XMLNode::emptyTheNode() in the bundled XML parser (ofstd/libsrc/ofxml.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 document with deeply nested elements. The parser is reachable through dcmencap when encapsulating a CDA document, and through any application that calls OFXMLParser::parseFile() or OFXMLParser::parseString() on untrusted input. The issue is fixed in commit d12e350e687530eb41e2b0c860aff4d8c04e5941.
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-2026-44033

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III. Intelligence Information for CVE-2026-44033

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Other References for CVE-2026-44033 (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-2026-44036 5.5 MEDIUM Uncontrolled recursion in DCMTK xml2dcm 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-2026-44033

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