{"id":"CVE-2026-44665","revision":null,"records":[{"revision":"e78e47236ffe4a5abf1836af8e990015","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-44665","aliases":[],"title":"fast-xml-builder: Attribute values with unwanted quotes can bypass malicious or unwanted attributes","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. 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This gives the room for an attacker to insert unwanted attributes to the XML/HTML.\n\n## Detail\n\nMalicious Input\n```\n{\n      a: {\n        \"@_attr\": '\" onClick=\"alert(1)'\n      }\n}\n```\n\nOutput\n```xml\n<a attr=\"\" onClick=\"alert(1)\"></a>\n```\n\n### Workarounds\nIf you're not ignoring attributes then keep processEntities flag true.","state":0,"publishedAt":"2026-05-08T16:29:10+00:00","modifiedAt":"2026-09-10T03:51:04.681237+00:00","affected":[{"ecosystem":"npm","name":"fast-xml-builder","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.1.7"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":null,"severity":null},{"system":"CVSS_V4","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/NaturalIntelligence/fast-xml-builder/security/advisories/GHSA-5wm8-gmm8-39j9","https://nvd.nist.gov/vuln/detail/CVE-2026-44665","https://github.com/NaturalIntelligence/fast-xml-builder"],"sourceUrl":"https://github.com/advisories/GHSA-5wm8-gmm8-39j9","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-5wm8-gmm8-39j9","identifiers":["GHSA-5wm8-gmm8-39j9","CVE-2026-44665"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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