Low severity · published Oct 27, 2026
CVE-2026-116687
CKEditor: Cross-site scripting (XSS) in the engine package
New
3.1
CVSS
0.3%
EPSS
No
On KEV
Description
CKEditor 5 is a modern JavaScript rich-text editor with an MVC architecture. From 29.0.0 until 47.7.4 and 48.5.1, specially crafted markup can trigger cross-site scripting when General HTML Support is enabled and specifically configured to allow object content. Processing that content can execute attacker-controlled JavaScript in a browser context isolated from the origin of the application embedding the editor. This issue is fixed in versions 47.7.4 and 48.5.1.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 17% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CK
ckeditor5 · ckeditor
>= 29.0.0, < 47.7.4; >= 48.0.0, < 48.5.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-116687
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-116687
github.com
https://github.com/ckeditor/ckeditor5/commit/4d9c5bb34f63cd956d15ccafbe584e14280c86a0
github.com
https://github.com/ckeditor/ckeditor5/commit/a750e38635db6a18c5b11599c09f4fd702850423
github.com
https://github.com/ckeditor/ckeditor5/releases/tag/v47.7.4
github.com
https://github.com/ckeditor/ckeditor5/releases/tag/v48.5.1
github.com
https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-v6mg-96c6-gmpq
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