{"id":"CVE-2026-49978","sourceIdentifier":"security-advisories@github.com","published":"2026-07-14T21:17:02.560","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 3.4.7, DOMPurify IN_PLACE sanitization could skip shadow contents attached to an element inside <template>.content, allowing attacker-controlled markup such as event handlers, JavaScript URLs, or scripts to survive and execute when an application cloned and inserted the sanitized template. This issue is fixed in version 3.4.7."},{"lang":"es","value":"DOMPurify es un saneador de cross-site scripting exclusivo para DOM para HTML, MathML y SVG. Antes de la versión 3.4.7, el saneamiento IN_PLACE de DOMPurify podría omitir el contenido en la sombra adjunto a un elemento dentro de [template].content, permitiendo que el marcado controlado por el atacante, como controladores de eventos, URLs de JavaScript o scripts, sobreviviera y se ejecutara cuando una aplicación clonaba e insertaba la plantilla saneada. Este problema está solucionado en la versión 3.4.7."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"cure53","product":"DOMPurify","versions":[{"version":"< 3.4.6","status":"affected"}]}]}],"metrics":{"cvssMetricV40":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","baseScore":6.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"ACTIVE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}],"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","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":"2026-07-21T14:59:10.987336Z","id":"CVE-2026-49978","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"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:cure53:dompurify:*:*:*:*:*:*:*:*","versionEndExcluding":"3.4.7","matchCriteriaId":"B8B46CA2-8534-449B-8178-06632ED40826"}]}]}],"references":[{"url":"https://github.com/cure53/DOMPurify/commit/ca30f070c360df162a3e3848e80e6fd3c9e74bff","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/cure53/DOMPurify/releases/tag/3.4.7","source":"security-advisories@github.com","tags":["Release Notes"]},{"url":"https://github.com/cure53/DOMPurify/security/advisories/GHSA-rp9w-3fw7-7cwq","source":"security-advisories@github.com","tags":["Vendor Advisory","Exploit"]},{"url":"https://github.com/cure53/DOMPurify/security/advisories/GHSA-rp9w-3fw7-7cwq","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","tags":["Vendor Advisory","Exploit"]}]}