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.
Published: 2026-05-13
Score: 6.1 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-5wm8-gmm8-39j9 fast-xml-builder allows attribute values with unwanted quotes to bypass malicious or unwanted attributes
History

Thu, 14 May 2026 15:00:00 +0000

Type Values Removed Values Added
First Time appeared Naturalintelligence
Naturalintelligence fast-xml-builder
Vendors & Products Naturalintelligence
Naturalintelligence fast-xml-builder

Wed, 13 May 2026 16:15:00 +0000

Type Values Removed Values Added
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.
Title fast-xml-builder: Attribute values with unwanted quotes can bypass malicious or unwanted attributes
Weaknesses CWE-91
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}


Subscriptions

Naturalintelligence Fast-xml-builder
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-13T15:24:54.596Z

Reserved: 2026-05-07T16:20:08.659Z

Link: CVE-2026-44665

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-05-13T16:16:59.093

Modified: 2026-05-13T16:53:33.310

Link: CVE-2026-44665

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-14T14:34:15Z

Weaknesses