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OpenAdvisories
Medium · 6.1 CVE-2026-44665 EUVD-2026-30053GHSA-5wm8-gmm8-39j9

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

Published May 13, 2026 · Updated May 18, 2026 · Assigned by GitHub_M

Description

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 products

VendorProductAffectedFixed
NaturalIntelligence fast-xml-builder < 1.1.7 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Wolfi

ReleasePackageFixed inAdvisory
Wolfi rolling opensearch-dashboards-3 3.6.0-r4 —
Wolfi rolling renovate 43.170.12-r0 —

Affected packages

EcosystemPackageAffectedFixedRecord
npm fast-xml-builder < 1.1.7 1.1.7 GHSA-5wm8-gmm8-39j9

References