fkie_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.

GHSA-45c6-75p6-83cc — fast-xml-builder Comment Value regex can be bypassed

Affected: npm: fast-xml-builder

# Summary The fix for https://github.com/advisories/GHSA-gh4j-gqv2-49f6 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.

### Impact Any application with comment property enabled allow attacker to inject malicious or unwanted code like JS script tag in the XML/HTML output.

### Workarounds Check for the presence of 3 consecutive dashes externally in the property value used for comment tag.

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fkie_cve-2026-44664

GHSA-45c6-75p6-83cc — fast-xml-builder Comment Value regex can be bypassed