High 8.1Published Oct 27, 2026

CVE-2026-116688CKEditor: Cross-site scripting (XSS) in the engine package

Updated under an hour ago (Oct 28, 2026, 10:30 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for ckeditor5

Exploited in the last 30 days

CKEditor 5 is a modern JavaScript rich-text editor with an MVC architecture. From 45.0.0 until 47.7.4 and 48.5.1, the engine uses a vulnerable es-toolkit version whose prototype-pollution behavior can be reached while CKEditor processes incoming style attribute values. Crafted editor content can thereby cause unauthorized JavaScript execution in the browser. This issue is fixed in versions 47.7.4 and 48.5.1.

CVSS: 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Oct 27, 2026
First seen by InfoSec Signals: Oct 27, 2026

Affected products

Affected products

ckeditor ckeditor5 ckeditor:ckeditor5 (from the name)	from 45.0.0, < 47.7.4; from 48.0.0, < 48.5.1	CNA record

References

References

https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-rh54-vffm-5fvp	x-refsource-confirm
https://github.com/ckeditor/ckeditor5/commit/4d9c5bb34f63cd956d15ccafbe584e14280c86a0	x-refsource-misc
https://github.com/ckeditor/ckeditor5/commit/a750e38635db6a18c5b11599c09f4fd702850423	x-refsource-misc
https://github.com/ckeditor/ckeditor5/releases/tag/v47.7.4	x-refsource-misc
https://github.com/ckeditor/ckeditor5/releases/tag/v48.5.1	x-refsource-misc

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.