CVE-2026-116802: medium-severity vulnerability in cure53 DOMPurify
DOMPurify before 3.4.17 XSS via SMIL attributeName Guard Bypass in XHTML Mode
Published
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.1epss 0.2%
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Affected products
cure53 · DOMPurifyRelated CVEs — cure53 DOMPurify
In the same product, most dangerous first.
CVE-2024-48910CRITICALDOMPurify vulnerable to tampering by prototype polutionEPSS 1.2%CVE-2024-47875CRITICALDOMPurify nesting-based mXSSEPSS 1.1%CVE-2024-45801HIGHTampering by prototype polution in DOMPurifyEPSS 0.9%CVE-2026-65899MEDIUMDOMPurify before 3.4.9 Trusted Types Policy State ContaminationEPSS 0.4%CVE-2026-47423HIGHDOMPurify XSS via `selectedcontent` re-cloneEPSS 0.4%CVE-2026-49978MEDIUMDOMPurify IN_PLACE Sanitization Bypass via Attached Shadow Root Inside <template>.contentEPSS 0.4%