Medium 6.1Published Mar 5, 2026

CVE-2026-28343CKEditor 5 is a modern JavaScript rich-text editor with an MVC architecture.

Updated under an hour ago (2026-10-19 08:40 UTC)

Does this affect you?

It affects ckeditor5. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for ckeditor5

Exploited in the last 30 days

CKEditor 5 is a modern JavaScript rich-text editor with an MVC architecture. Starting in version 29.0.0 and 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.

CVSS: 6.1 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

ckeditor ckeditor5 ckeditor:ckeditor5	before 47.6.0	NVD

References

https://github.com/ckeditor/ckeditor5/releases/tag/v29.0.0
https://github.com/ckeditor/ckeditor5/releases/tag/v47.6.0release-notes
https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-jrqm-vmqc-gm93mitigation, vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.