Vulnerability · Published Oct 27, 2026 · Assigned by GitHub_M

CVE-2026-116687CKEditor: Cross-site scripting (XSS) in the engine package

Low 3.1

In plain English

A low-severity cross-site scripting in ckeditor5 from ckeditor. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 17% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)3.1Low

Exploit odds (30 days)0.3%top 83.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Ubuntu:22.04:LTS	ckeditor3	no fix listed	UBUNTU-CVE-2026-116687
Ubuntu:24.04:LTS	ckeditor3	no fix listed	UBUNTU-CVE-2026-116687
Ubuntu:22.04:LTS	ldap-account-manager	no fix listed	UBUNTU-CVE-2026-116687
Ubuntu:24.04:LTS	ldap-account-manager	no fix listed	UBUNTU-CVE-2026-116687
Ubuntu:26.04:LTS	ldap-account-manager	no fix listed	UBUNTU-CVE-2026-116687
Ubuntu:22.04:LTS	request-tracker4	no fix listed	UBUNTU-CVE-2026-116687
Ubuntu:24.04:LTS	request-tracker4	no fix listed	UBUNTU-CVE-2026-116687
Ubuntu:26.04:LTS	request-tracker4	no fix listed	UBUNTU-CVE-2026-116687
npm	@ckeditor/ckeditor5-engine	48.5.1	GHSA-v6mg-96c6-gmpq
npm	@ckeditor/ckeditor5-engine	47.7.4	GHSA-v6mg-96c6-gmpq
npm	ckeditor5	48.5.1	GHSA-v6mg-96c6-gmpq
npm	ckeditor5	47.7.4	GHSA-v6mg-96c6-gmpq

Affected products (as reported)

Vendor	Product	Versions
ckeditor	ckeditor5	>= 29.0.0, < 47.7.4>= 48.0.0, < 48.5.1

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N

References

https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-v6mg-96c6-gmpq 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