PT-2026-140006

CVE-2026-124493

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Published

2026-11-08

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Updated

2026-11-08

Description by

CVSS 4.0
9.3
Critical
MetricsAV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Name of the Vulnerable Software and Affected Versions SunEditor versions prior to 3.4.0
Description A stored cross-site scripting issue exists in the DocumentType constructor. The flaw occurs when header textContent is injected into innerHTML without proper HTML escaping. This allows attackers to store entity-encoded HTML within h1-h6 headers, which executes JavaScript when editors initialize in document:header mode, potentially leading to session cookie theft.
Recommendations Update to version 3.4.0.
Exploitability
Fix
Impacts
Researchers
Vendors
Affected products
Weakness enumeration
CWE-79: Improper Neutralization of Input During Web Page Generation (\'Cross-site Scripting\')
Related identifiers
CVE-2026-124493
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