{"id":"CVE-2026-49458","sourceIdentifier":"security-advisories@github.com","published":"2026-07-14T21:17:01.620","lastModified":"2026-10-24T21:10:00.130","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.6, DOMPurify.sanitize(node, { IN_PLACE: true }) accepted same-origin foreign-realm DOM nodes while follow-on checks used parent-realm constructors, causing instanceof checks for forms, named node maps, document fragments, and elements to fail and skip clobber, template-content, and shadow-DOM sanitization branches so executable markup could survive. This issue is fixed in version 3.4.6."},{"lang":"es","value":"DOMPurify es un sanitizador de cross-site scripting solo para DOM para HTML, MathML y SVG. Antes de la versión 3.4.6, DOMPurify.sanitize(node, { IN_PLACE: true }) aceptaba nodos DOM de origen idéntico y ámbito externo mientras que las comprobaciones posteriores utilizaban constructores del ámbito padre, lo que provocaba que las comprobaciones instanceof para formularios, mapas de nodos con nombre, fragmentos de documento y elementos fallaran y omitieran las ramas de sanitización de clobber, template-content y shadow-DOM de modo que el marcado ejecutable podía sobrevivir. Este problema está solucionado en la versión 3.4.6."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"cure53","product":"DOMPurify","versions":[{"version":"< 3.4.6","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","baseScore":6.1,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":2.8,"impactScore":2.7}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-07-15T13:02:56.040047Z","id":"CVE-2026-49458","options":[{"exploitation":"poc"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-79"},{"lang":"en","value":"CWE-501"},{"lang":"en","value":"CWE-693"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:cure53:dompurify:*:*:*:*:*:*:*:*","versionEndExcluding":"3.4.6","matchCriteriaId":"C892F380-B048-4862-B6D1-AC34B0B4D141"}]}]}],"references":[{"url":"https://github.com/cure53/DOMPurify/commit/bb7739e5bccec7e1ab3dae3f3e42d02db3acaaae","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/cure53/DOMPurify/releases/tag/3.4.6","source":"security-advisories@github.com","tags":["Release Notes"]},{"url":"https://github.com/cure53/DOMPurify/security/advisories/GHSA-hpcv-96wg-7vj8","source":"security-advisories@github.com","tags":["Exploit","Mitigation","Vendor Advisory"]},{"url":"https://github.com/cure53/DOMPurify/security/advisories/GHSA-hpcv-96wg-7vj8","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","tags":["Exploit","Mitigation","Vendor Advisory"]}]}