xmldom: XML injection through unvalidated DocumentType serialization

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Summary

CVECVE-2026-41674
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-07 04:16:33 UTC
Updated2026-05-07 15:02:46 UTC
Descriptionxmldom 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.

Risk And Classification

Primary CVSS: v4.0 8.7 HIGH from [email protected]

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS: 0.000470000 probability, percentile 0.146670000 (date 2026-05-12)

Problem Types: CWE-91 | CWE-91 CWE-91: XML Injection (aka Blind XPath Injection)

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary8.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/C...
4.0CNADECLARED8.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
High
Availability
None
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Xmldom Xmldom affected xmldom <= 0.6.0 Not specified
CNA Xmldom Xmldom affected @xmldom/xmldom >= 0.9.0, < 0.9.10 Not specified
CNA Xmldom Xmldom affected @xmldom/xmldom < 0.8.13 Not specified

References

ReferenceSourceLinkTags
github.com/xmldom/xmldom/commit/372008f9ae0e20fd69f761c7b79e202598267314 [email protected] github.com
github.com/xmldom/xmldom/security/advisories/GHSA-f6ww-3ggp-fr8h 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/xmldom/xmldom/releases/tag/0.9.10 [email protected] github.com
github.com/xmldom/xmldom/releases/tag/0.8.13 [email protected] github.com
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