{"id":"CVE-2026-116802","published":"2026-10-27T00:17:11.637","lastModified":"2026-10-27T00:17:11.637","description":"DOMPurify before 3.4.17 contains a cross-site scripting vulnerability that allows attackers to bypass the SMIL attributeName=href guard when PARSER_MEDIA_TYPE is application/xhtml+xml, because transformCaseFunc does not lowercase attribute names. Attackers can submit SVG with an animate or set element using attributeName=\"href\" and a javascript: entry in values to execute script when users click the sanitized link.","cvssScore":6.1,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","cwes":["CWE-79"],"vendors":[],"products":[],"references":[{"url":"https://github.com/cure53/DOMPurify/security/advisories/GHSA-c6gr-qvv4-5v3f","tags":[]},{"url":"https://www.vulncheck.com/advisories/dompurify-before-3.4.17-xss-via-smil-attributename-guard-bypass-in-xhtml-mode","tags":[]}],"exploitRefs":[{"url":"https://github.com/cure53/DOMPurify/security/advisories/GHSA-c6gr-qvv4-5v3f","tags":[]}],"hasPoc":true,"ai":null}