{"id":"EM-20261111-LBYB","url":"https://cyber.eventmonitor.net/incident/EM-20261111-LBYB/critical-vulnerability-cve-2026-126800/","type":"cve","title":"Critical Vulnerability (CVE-2026-126800)","subtitle":"CVE-2026-126800","subject":"CVE-2026-126800","status":"Developing","severity":"critical","affected":[],"headline":null,"born":"2026-11-11T21:33:00.000Z","firstSignal":"2026-11-11T21:16:43.507Z","lastSignal":"2026-11-11T21:33:00.000Z","updated":"2026-11-11T22:13:05.345Z","revision":1,"life":[{"status":"Born","at":"2026-11-11T21:33:00.000Z","why":"second independent source: C29 CIRCL Vulnerability-Lookup"},{"status":"Developing","at":"2026-11-11T21:33:00.000Z","why":"signals keep joining"}],"changeLog":[{"at":"2026-11-11T21:16:43.507Z","what":"First signal: C6 NVD CVE API 2.0"},{"at":"2026-11-11T21:33:00.000Z","what":"Born: second source, C29 CIRCL Vulnerability-Lookup. Page EM-20261111-LBYB created."}],"stages":[{"name":"Disclosed","at":"2026-11-11T21:16:43.507Z","detail":"C6 NVD published"},{"name":"Scored","at":"2026-11-11T21:16:43.507Z","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":"2026-11-11T21:16:43.507Z","source":"C6","sourceName":"NVD CVE API 2.0","role":"Database","severity":4,"title":"CVE-2026-126800 (CVSS 9.3)","text":"Hydro @hydrooj/ui-default before 4.59.1 contains a stored cross-site scripting vulnerability that allows registered users to inject script by placing double quotes in language- class tokens within markdown-it-xss.ts. Attackers can store a payload in their profile bio that executes when administrators or other users view it, stealing the non-httpOnly sid session cookie for session hijacking.","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-126800"},{"at":"2026-11-11T21:33:00.000Z","source":"C29","sourceName":"CIRCL Vulnerability-Lookup","role":"Database","severity":2,"title":"GHSA-mfr7-qrjx-rpgx / CVE-2026-126800","text":"Hydro @hydrooj/ui-default before 4.59.1 contains a stored cross-site scripting vulnerability that allows registered users to inject script by placing double quotes in language- class tokens within markdown-it-xss.ts. Attackers can store a payload in their profile bio that executes when…","url":"https://vulnerability.circl.lu/vuln/GHSA-mfr7-qrjx-rpgx"}],"crowd":[],"reference":{"nvd":{"published":"2026-11-11T21:16:43.507","score":9.3,"severity":"CRITICAL","desc":"Hydro @hydrooj/ui-default before 4.59.1 contains a stored cross-site scripting vulnerability that allows registered users to inject script by placing double quotes in language- class tokens within markdown-it-xss.ts. Attackers can store a payload in their profile bio that executes when…","product":"","seen":1794435185345},"kev":null,"epss":null,"p0":false},"mergedInto":null,"publisher":"Event Monitor Cyber"}