CVE-2026-116687 json
CKEditor: Cross-site scripting (XSS) in the engine package
published 2026-10-27 12 d ago modified 2026-11-03 5 d ago also GHSA-v6mg-96c6-gmpq , EUVD-2026-111365
- cvss
- 3.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 16%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- npm ckeditor5 47.7.4, 48.5.1
- npm @ckeditor/ckeditor5-engine 47.7.4, 48.5.1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 5 d ago
Exploit prediction
0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 3.1 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N |
| GitHub | 3.1 | 3.1 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | ckeditor5 | >=29.0.0, <47.7.4 >=48.0.0, <48.5.1 |
47.7.4 48.5.1 |
| npm | @ckeditor/ckeditor5-engine | >=29.0.0, <47.7.4 >=48.0.0, <48.5.1 |
47.7.4 48.5.1 |
Affected products
- ckeditor ckeditor5
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/ckeditor/ckeditor5/commit/4d9c5bb34f63cd956d15ccafbe584e14280c86a0
web
-
github.com
/ckeditor/ckeditor5/commit/a750e38635db6a18c5b11599c09f4fd702850423
web
-
github.com
/ckeditor/ckeditor5/security/advisories/GHSA-v6mg-96c6-gmpq
web
-
github.com
/ckeditor/ckeditor5/releases/tag/v47.7.4
web
-
github.com
/ckeditor/ckeditor5/releases/tag/v48.5.1
web
-
github.com
/ckeditor/ckeditor5
package
Sources
- CVE List CVE-2026-116687
- GitHub Advisory GHSA-v6mg-96c6-gmpq
- NVD CVE-2026-116687
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.