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
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
xmldom xmldom
xmldom <= 0.6.0affected@xmldom/xmldom >= 0.9.0, < 0.9.10affected@xmldom/xmldom < 0.8.13affected
References
- https://github.com/xmldom/xmldom/security/advisories/GHSA-f6ww-3ggp-fr8h ↗
- 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://access.redhat.com/security/cve/CVE-2026-41674 ↗
- https://bugzilla.redhat.com/show_bug.cgi?id=2467620 ↗
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41674.json ↗
- https://access.redhat.com/errata/RHSA-2026:21338 ↗
- https://access.redhat.com/errata/RHSA-2026:26234 ↗
- https://access.redhat.com/errata/RHSA-2026:21703 ↗
- https://access.redhat.com/errata/RHSA-2026:20034 ↗