CriticalCritical vulnerability
CVE-2026-124494 (CVSS 9.3)
NVD · officialPublished Nov 8, 2026Risk 50/100
SunEditor before 3.4.0 contains a stored cross-site scripting vulnerability because the html.clean() sanitizer's _normalizeURL() function decodes named entities like : to an empty string. Attackers can inject href values such as javascript: that pass the _isSafeURL() check but are decoded by browsers, executing JavaScript when victims click stored links.
Technical details
CVSS
9.3
AV:NetworkAC:LowPR:NoneUI:Active
Evidence and sources
This record is attributed to NVD. Exploitation status and remediation guidance are kept separate from the vulnerability's technical severity.
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