{"id":"CVE-2026-116687","sourceIdentifier":"security-advisories@github.com","published":"2026-10-27T20:17:13.890","lastModified":"2026-10-28T15:21:31.673","vulnStatus":"Awaiting Analysis","cveTags":[],"descriptions":[{"lang":"en","value":"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":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"ckeditor","product":"ckeditor5","versions":[{"version":">= 29.0.0, < 47.7.4","status":"affected"},{"version":">= 48.0.0, < 48.5.1","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N","baseScore":3.1,"baseSeverity":"LOW","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":1.6,"impactScore":1.4}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Primary","description":[{"lang":"en","value":"CWE-79"}]}],"references":[{"url":"https://github.com/ckeditor/ckeditor5/commit/4d9c5bb34f63cd956d15ccafbe584e14280c86a0","source":"security-advisories@github.com"},{"url":"https://github.com/ckeditor/ckeditor5/commit/a750e38635db6a18c5b11599c09f4fd702850423","source":"security-advisories@github.com"},{"url":"https://github.com/ckeditor/ckeditor5/releases/tag/v47.7.4","source":"security-advisories@github.com"},{"url":"https://github.com/ckeditor/ckeditor5/releases/tag/v48.5.1","source":"security-advisories@github.com"},{"url":"https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-v6mg-96c6-gmpq","source":"security-advisories@github.com"}]}