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.

Project Subscriptions

No data.

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
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

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'}


Projects

Sign in to view the affected projects.

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: 2026-05-13T17:45:25Z

Weaknesses