CVE-2026-41674
Medium
Elevated severity or exploit probability.
CVSS base
7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS — probability of exploitation (30 days)
0.7%
49.0th percentile
CISA KEV
Not listed
Weakness / dates
CWE-91
Published 2026-05-07 · modified 2026-09-10
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.
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