CVE-2026-124493
CRITICAL—CVSS v3
—CVSS v2
—
EPSS (exploit probability)
CWE-79CWE
Description
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.
Affected routers (0)
No routers currently mapped to this CVE in our database.