{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-49978","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-02T18:30:51.281Z","datePublished":"2026-07-14T20:02:46.263Z","dateUpdated":"2026-07-21T14:59:20.582Z"},"containers":{"cna":{"title":"DOMPurify IN_PLACE Sanitization Bypass via Attached Shadow Root Inside <template>.content","problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"ACTIVE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","subAvailabilityImpact":"NONE","baseScore":6.3,"baseSeverity":"MEDIUM","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","version":"4.0"}}],"references":[{"name":"https://github.com/cure53/DOMPurify/security/advisories/GHSA-rp9w-3fw7-7cwq","tags":["x_refsource_CONFIRM"],"url":"https://github.com/cure53/DOMPurify/security/advisories/GHSA-rp9w-3fw7-7cwq"},{"name":"https://github.com/cure53/DOMPurify/commit/ca30f070c360df162a3e3848e80e6fd3c9e74bff","tags":["x_refsource_MISC"],"url":"https://github.com/cure53/DOMPurify/commit/ca30f070c360df162a3e3848e80e6fd3c9e74bff"},{"name":"https://github.com/cure53/DOMPurify/releases/tag/3.4.7","tags":["x_refsource_MISC"],"url":"https://github.com/cure53/DOMPurify/releases/tag/3.4.7"}],"affected":[{"vendor":"cure53","product":"DOMPurify","versions":[{"version":"< 3.4.6","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-07-14T20:02:46.263Z"},"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."}],"source":{"advisory":"GHSA-rp9w-3fw7-7cwq","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/cure53/DOMPurify/security/advisories/GHSA-rp9w-3fw7-7cwq","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-21T14:59:10.987336Z","id":"CVE-2026-49978","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-07-21T14:59:20.582Z"}}]}}