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fast-xml-builder vulnerabilities

Vulnerabilities published for fast-xml-builder in the last 30 days: 0. Listed in the KEV catalogue: 0.

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Vulnerabilities: 2

  1. CVE-2026-44664

    Medium · CVSS 6.1EPSS 0.19%Fix available

    fast-xml-builder: Comment Value bypass regex

    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.

    fast-xml-builderNode.js
    • Update to 1.1.6
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗

  2. CVE-2026-44665

    Medium · CVSS 6.1EPSS 0.24%Fix available

    fast-xml-builder: Attribute values with unwanted quotes can bypass malicious or unwanted attributes

    fast-xml-builder builds XML from JSON. Prior to 1.1.7, when an input data has quotes in attribute values but process entities is not enabled, it breaks the attribute value into multiple attributes. This gives the room for an attacker to insert unwanted attributes to the XML/HTML. This vulnerability is fixed in 1.1.7.

    fast-xml-builderNode.js
    • Update to 1.1.7
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗

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