Vulnerability DatabaseCVE-2026-44665
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CVE-2026-44665
Published:May 13, 2026
Updated:May 18, 2026
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.
Affected Packages
fast-xml-builder (NPM):
Affected version(s) >=1.0.0 <1.1.7
Fix Suggestion:
Update to version 1.1.7
fast-xml-builder (NPM):
Affected version(s) >=1.0.0 <1.1.7
Fix Suggestion:
Update to version 1.1.7
Related Resources (3)
https://github.com/NaturalIntelligence/fast-xml-builder
https://nvd.nist.gov/vuln/detail/CVE-2026-44665
https://github.com/NaturalIntelligence/fast-xml-builder/security/advisories/GHSA-5wm8-gmm8-39j9
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CVSS v4
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
LOW
Subsequent System Integrity
LOW
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.1
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Improper Restriction of XML External Entity Reference
CWE-611
XML Injection (aka Blind XPath Injection)
CWE-91
EPSS
Base Score:
0.03