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Description

CKEditor 5 is a modern JavaScript rich-text editor with an MVC architecture. Prior to version 47.6.0, a cross-site scripting (XSS) vulnerability has been discovered in the General HTML Support feature. This vulnerability could be triggered by inserting specially crafted markup, leading to unauthorized JavaScript code execution, if the editor instance used an unsafe General HTML Support configuration. This issue has been patched in version 47.6.0.

PUBLISHED Reserved 2026-02-26 | Published 2026-03-05 | Updated 2026-03-06 | Assigner GitHub_M




MEDIUM: 6.4CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Problem types

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

< 47.6.0
affected

References

github.com/...ditor5/security/advisories/GHSA-jrqm-vmqc-gm93

github.com/ckeditor/ckeditor5/releases/tag/v47.6.0

cve.org (CVE-2026-28343)

nvd.nist.gov (CVE-2026-28343)

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