{"id":"EM-20261108-WDOH","url":"https://cyber.eventmonitor.net/incident/EM-20261108-WDOH/critical-suneditor-vulnerability-cve-2026-124493/","type":"cve","title":"Critical SunEditor Vulnerability (CVE-2026-124493)","subtitle":"CVE-2026-124493","subject":"CVE-2026-124493","status":"Developing","severity":"critical","affected":[],"headline":null,"born":"2026-11-08T15:31:30.000Z","firstSignal":"2026-11-08T14:18:19.130Z","lastSignal":"2026-11-08T15:31:30.000Z","updated":"2026-11-08T16:25:20.514Z","revision":1,"life":[{"status":"Born","at":"2026-11-08T15:31:30.000Z","why":"second independent source: C29 CIRCL Vulnerability-Lookup"},{"status":"Developing","at":"2026-11-08T15:31:30.000Z","why":"signals keep joining"}],"changeLog":[{"at":"2026-11-08T14:18:19.130Z","what":"First signal: C6 NVD CVE API 2.0"},{"at":"2026-11-08T15:31:30.000Z","what":"Born: second source, C29 CIRCL Vulnerability-Lookup. Page EM-20261108-WDOH created."}],"stages":[{"name":"Disclosed","at":"2026-11-08T14:18:19.130Z","detail":"C6 NVD published"},{"name":"Scored","at":"2026-11-08T14:18:19.130Z","detail":"CVSS 9.3"},{"name":"Exploited","at":null,"detail":"No exploitation reported"},{"name":"Advisories","at":null,"detail":"None yet"},{"name":"Vendor Response","at":null,"detail":"None in sources yet"},{"name":"Resolved","at":null,"detail":"After 14 quiet days"}],"signals":[{"at":"2026-11-08T14:18:19.130Z","source":"C6","sourceName":"NVD CVE API 2.0","role":"Database","severity":4,"title":"CVE-2026-124493 (CVSS 9.3)","text":"SunEditor before 3.4.0 contains a stored cross-site scripting vulnerability in the DocumentType constructor that injects header textContent into innerHTML without HTML escaping. Attackers can store entity-encoded HTML in h1-h6 headers that executes JavaScript when editors using document:header mode initialize, enabling session cookie theft.","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-124493"},{"at":"2026-11-08T15:31:30.000Z","source":"C29","sourceName":"CIRCL Vulnerability-Lookup","role":"Database","severity":2,"title":"GHSA-pxmj-79fq-gv83 / CVE-2026-124493","text":"SunEditor before 3.4.0 contains a stored cross-site scripting vulnerability in the DocumentType constructor that injects header textContent into innerHTML without HTML escaping. Attackers can store entity-encoded HTML in h1-h6 headers that executes JavaScript when editors using document:header…","url":"https://vulnerability.circl.lu/vuln/GHSA-pxmj-79fq-gv83"}],"crowd":[],"reference":{"nvd":{"published":"2026-11-08T14:18:19.130","score":9.3,"severity":"CRITICAL","desc":"SunEditor before 3.4.0 contains a stored cross-site scripting vulnerability in the DocumentType constructor that injects header textContent into innerHTML without HTML escaping. Attackers can store entity-encoded HTML in h1-h6 headers that executes JavaScript when editors using document:header…","product":"","seen":1794155120514},"kev":null,"epss":null,"p0":false},"mergedInto":null,"publisher":"Event Monitor Cyber"}