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CVE-2026-41674— xmldom: XML injection through unvalidated DocumentType serialization

Quick assessment

Affected
xmldom xmldom
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

XMLDOM是jindw个人开发者的一个 W3C DOM for Node 的 JavaScript 实现。 XMLDOM 0.9.10之前版本、0.8.13之前版本和xmldom 0.6.0及之前版本存在安全漏洞，该漏洞源于序列化DocumentType节点字段时未进行转义或验证，可能导致DOCTYPE声明提前终止并注入任意标记。

CVSS 8.7 · High EPSS 0.65% · P49

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 3

VendorProduct Version RangeStatus
xmldom xmldom xmldom <= 0.6.0 affected
@xmldom/xmldom >= 0.9.0, < 0.9.10 affected
@xmldom/xmldom < 0.8.13 affected
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I. Basic Information for CVE-2026-41674

Vulnerability Information
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Vulnerability Title
xmldom: XML injection through unvalidated DocumentType serialization
Source: CVE Program / CVE List V5
Vulnerability Description
xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) `DOMParser` and `XMLSerializer` module. In @xmldom/xmldom prior to versions 0.9.10 and 0.8.13 and xmldom version 0.6.0 and prior, the package serializes DocumentType node fields (internalSubset, publicId, systemId) verbatim without any escaping or validation. When these fields are set programmatically to attacker-controlled strings, XMLSerializer.serializeToString can produce output where the DOCTYPE declaration is terminated early and arbitrary markup appears outside it. This issue has been patched in versions @xmldom/xmldom versions 0.9.10 and 0.8.13.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
XML注入(XPath盲注)
Source: CVE Program / CVE List V5
Vulnerability Title
XMLDOM 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
XMLDOM是jindw个人开发者的一个 W3C DOM for Node 的 JavaScript 实现。 XMLDOM 0.9.10之前版本、0.8.13之前版本和xmldom 0.6.0及之前版本存在安全漏洞，该漏洞源于序列化DocumentType节点字段时未进行转义或验证，可能导致DOCTYPE声明提前终止并注入任意标记。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
xmldom xmldom xmldom <= 0.6.0 -

II. Public POCs for CVE-2026-41674

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 10655 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
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III. Intelligence Information for CVE-2026-41674

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Patches & Fixes for CVE-2026-41674 (1)

Vendor Advisories for CVE-2026-41674 (1)

Vendor Pages for CVE-2026-41674 (1)

Other References for CVE-2026-41674 (1)

Same Patch Batch · xmldom · 2026-05-07 · 4 CVEs total

CVE-2026-41675 8.7 HIGH xmldom: XML node injection through unvalidated processing instruction serialization
CVE-2026-41673 8.7 HIGH xmldom: Denial of service via uncontrolled recursion in XML serialization
CVE-2026-41672 8.7 HIGH xmldom: XML node injection through unvalidated comment serialization

IV. Related Vulnerabilities

Same product: xmldom
Same vendor: xmldom
Same weakness: CWE-91

V. Comments for CVE-2026-41674

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