CVE-2026-44664
fast-xml-builder builds XML from JSON. In 1.1.5, the fix for CVE-2026-41650 in fast-xml-parser sanitizes -- sequences in XML comment content using .replace(/--/g, '- -'). This skip the values containing three consecutive dashes (e.g., --->...), allowing an attacker to break out of an XML comment and inject arbitrary XML/HTML content. This vulnerability is fixed in 1.1.6.
Scoring
- Severity
- MEDIUM
- CVSS base score
- 6.1
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS probability
- 0.19%
- CWE
- CWE-91
- Published
- 2026-05-13
- Last modified
- 2026-05-13
Affected products
- NaturalIntelligence fast-xml-builder
Weakness type
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- CVE-2026-83609 — xmldom: Creation-time XML Name/QName validation is bypassable via an embedded line terminator, allowing injection on the default serialization path
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- CVE-2026-83607 — xmldom: Element name injection via createElement() bypasses requireWellFormed
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