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.

CVSS v3 6.1 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/NaturalIntelligence/fast-xml-builder/security/advisories/GHSA-45c6-75p6-83cc

Configurations

No configuration.

History

26 Oct 2026, 18:10

Type	Values Removed	Values Added
Summary		(es) fast-xml-builder construye XML a partir de JSON. En 1.1.5, la corrección para CVE-2026-41650 en fast-xml-parser sanitiza las secuencias -- en el contenido de los comentarios XML utilizando .replace(/--/g, ’- -’). Esto omite los valores que contienen tres guiones consecutivos (p. ej., --->...), permitiendo a un atacante escapar de un comentario XML e inyectar contenido XML/HTML arbitrario. Esta vulnerabilidad está corregida en 1.1.6.

Information

Published : 2026-05-13 16:16

Updated : 2026-10-26 18:10

NVD link : CVE-2026-44664

Mitre link : CVE-2026-44664

CVE.ORG link : CVE-2026-44664

JSON object : View

Products Affected

No product.

CWE

CWE-91

XML Injection (aka Blind XPath Injection)

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