CVE-2026-124493: critical vulnerability in JiHong88 suneditor
SunEditor before 3.4.0 Stored XSS via DocumentType Header textContent
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.3epss 0.3%
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
Affected products
JiHong88 · suneditorRelated CVEs — JiHong88 suneditor
In the same product, most dangerous first.
CVE-2026-54606HIGHSunEditor: DOM XSS in SunEditor Embed Plugin via External Script Element After Iframe EmbedEPSS 0.6%CVE-2026-59167CRITICALSunEditor: Critical XSS vulnerability - sanitizer bypassEPSS 0.5%CVE-2026-124494CRITICALSunEditor before 3.4.0 Stored XSS via : Entity Sanitizer BypassEPSS 0.3%CVE-2026-124492HIGHSunEditor before 3.4.0 Stored XSS via Link Modal Bookmark ListEPSS 0.2%CVE-2026-124491MEDIUMSunEditor before 3.4.0 Stored XSS via FileUpload Plugin FilenameEPSS 0.2%