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CVE-2026-44031— Uncontrolled recursion in the DCMTK DICOM dataset parser allows unauthenticated remote 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.

OFFIS DCMTK 3.7.0 的 dcmdata 库中，DcmSequenceOfItems::read() 和 DcmItem::read() 存在不受控制的递归问题。攻击者无需认证即可远程发起攻击，通过构造包含深度嵌套序列（SQ 元素）的 DICOM 数据集，导致拒绝服务（栈溢出及进程崩溃）。攻击者可通过向 storescp、dcmrecv、dcmqrscp 或任何基于 DCMTK 构建的 DICOM 服务发送包含恶意数据的 C-STORE 请求来触发此漏洞，因为这些服务在接收数据集后、任何身份验证之前会

CVSS 7.5 · High

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth
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I. Basic Information for CVE-2026-44031

Vulnerability Information
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Vulnerability Title
Uncontrolled recursion in the DCMTK DICOM dataset parser allows unauthenticated remote denial of service
Source: CVE Program / CVE List V5
Vulnerability Description
Uncontrolled recursion in DcmSequenceOfItems::read() and DcmItem::read() in the dcmdata library of OFFIS DCMTK 3.7.0 allows a remote, unauthenticated attacker to cause a denial of service (stack exhaustion and process crash) via a DICOM dataset containing deeply nested sequences (SQ elements). The dataset can be sent in a C-STORE request to storescp, dcmrecv, dcmqrscp, or any other DICOM service built on DCMTK, because the received dataset is parsed before any authentication takes place. Local tools such as dcmdump also crash when opening such a file. The issue is fixed in commit 885ff0f10372bd589b5f44cea974f28a3964cb0f, which adds a configurable sequence nesting depth limit (default 64).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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-2026-44031

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III. Intelligence Information for CVE-2026-44031

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Other References for CVE-2026-44031 (2)

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

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-2026-44033 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-2026-44031

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