{"schema":"threatline.record/2","record":{"id":"CVE-2026-116802","aliases":["GHSA-c6gr-qvv4-5v3f"],"summary":"DOMPurify before 3.4.17 XSS via SMIL attributeName Guard Bypass in XHTML Mode","details":"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.","categories":["Libraries & packages"],"product":"DOMPurify","vendor":"cure53","ecosystem":"npm","affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-116802","source_modified_at":"2026-10-26T23:05:34.457Z","fetched_at":"2026-10-26T23:45:56.352924Z","product":"DOMPurify","vendor":"cure53","versions":[{"version":"0","status":"affected","versionType":"semver","lessThan":"3.4.17"},{"version":"3.4.17","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-c6gr-qvv4-5v3f","source_modified_at":"2026-10-22T16:30:30.125885064Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"dompurify","purl":"pkg:npm/dompurify"},"ranges":[{"events":[{"introduced":"0"},{"fixed":"3.4.17"}],"type":"SEMVER"}],"versions":[]}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-116802","source_modified_at":"2026-10-26T23:05:34.457Z","fetched_at":"2026-10-26T23:45:56.352924Z","package":{"name":"DOMPurify","ecosystem":null},"version":"3.4.17","basis":"first unaffected version stated in the CVE record"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-c6gr-qvv4-5v3f","source_modified_at":"2026-10-22T16:30:30.125885064Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"dompurify","purl":"pkg:npm/dompurify"},"version":"3.4.17"}],"cvss":5.1,"severity":"Medium","kev":{"listed":false},"epss":{"probability":null,"percentile":null,"score_date":null},"published_at":"2026-10-26T23:05:34.457Z","modified_at":"2026-10-26T23:05:34.457Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-116802","fetched_at":"2026-10-26T23:45:56.352924Z","source_modified_at":"2026-10-26T23:05:34.457Z"},{"source":"OSV","url":"https://osv.dev/vulnerability/GHSA-c6gr-qvv4-5v3f","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-22T16:30:30.125885064Z"}],"sources":["CVE List","OSV"],"references":[{"source":"CVE List","url":"https://github.com/cure53/DOMPurify/security/advisories/GHSA-c6gr-qvv4-5v3f","tags":["vendor-advisory"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/dompurify-before-3.4.17-xss-via-smil-attributename-guard-bypass-in-xhtml-mode","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"ecosystem","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-26T23:05:34.457Z","content_hash":"6da4441260bef108f68ac0519f731ae1cf912d552d026ae4a162ce409594e843"}}