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.
References (1)
Core 1
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/NaturalIntelligence/fast-xml-builder/security/advisories/GHSA-45c6-75p6-83cc
Scores
CVSS v3
6.1
EPSS
0.0001
EPSS Percentile
1.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-91
Status
published
Products (2)
NaturalIntelligence/fast-xml-builder
1.1.5
npm/fast-xml-builder
1.1.5 - 1.1.6npm
Published
May 13, 2026
Tracked Since
May 13, 2026