What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-07 · updated 2026-09-10
• Weakness: CWE-91

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.

Affected products

• xmldom: xmldom <= 0.6.0, @xmldom/xmldom >= 0.9.0, < 0.9.10, @xmldom/xmldom < 0.8.13

References

• https://github.com/xmldom/xmldom/commit/372008f9ae0e20fd69f761c7b79e202598267314
• https://github.com/xmldom/xmldom/releases/tag/0.8.13
• https://github.com/xmldom/xmldom/releases/tag/0.9.10
• https://github.com/xmldom/xmldom/security/advisories/GHSA-f6ww-3ggp-fr8h
• https://access.redhat.com/errata/RHSA-2026:20034
• https://access.redhat.com/errata/RHSA-2026:21338
• https://access.redhat.com/errata/RHSA-2026:21703
• https://access.redhat.com/errata/RHSA-2026:26234
• https://access.redhat.com/security/cve/CVE-2026-41674
• https://bugzilla.redhat.com/show_bug.cgi?id=2467620
• https://github.com/xmldom/xmldom/security/advisories/GHSA-f6ww-3ggp-fr8h
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41674.json

Get alerted when CVE-2026-41674 or the next vulnerability affects your stack