fast-xml-builder: Comment Value bypass regex_CVE-2026-44664

6.1 / 10

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Description

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.

Basic Information

ID CVE-2026-44664

Source GitHub_M

Published May 13, 2026 at 15:27

Modified May 13, 2026 at 16:46

Affected Product

Vendor NaturalIntelligence

Product fast-xml-builder

Version 1.1.5

Affected Versions NaturalIntelligence fast-xml-builder 1.1.5

CWE Classification

CWE-91

References

github.com /NaturalIntelligence/fast-xml-builder/security/advisories/GHSA-45c6-75p6-83cc

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