{"id":"CVE-2026-116687","summary":"CKEditor: Cross-site scripting (XSS) in the engine package","details":"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.","aliases":["GHSA-v6mg-96c6-gmpq"],"modified":"2026-10-28T10:45:21.615742106Z","published":"2026-10-27T19:33:11.074Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-79"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/116xxx/CVE-2026-116687.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/116xxx/CVE-2026-116687.json"},{"type":"FIX","url":"https://github.com/ckeditor/ckeditor5/commit/4d9c5bb34f63cd956d15ccafbe584e14280c86a0"},{"type":"FIX","url":"https://github.com/ckeditor/ckeditor5/commit/a750e38635db6a18c5b11599c09f4fd702850423"},{"type":"WEB","url":"https://github.com/ckeditor/ckeditor5/releases/tag/v47.7.4"},{"type":"WEB","url":"https://github.com/ckeditor/ckeditor5/releases/tag/v48.5.1"},{"type":"ADVISORY","url":"https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-v6mg-96c6-gmpq"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116687"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/ckeditor/ckeditor5","events":[{"introduced":"0947bb06998dd94f671caa80ade835bc7334ba87"},{"fixed":"909a99ede76b640b7b4780fadaff900b8a81a27e"},{"introduced":"d43f35a99e67308d76afa3a58c1ff25a2019ce07"},{"fixed":"1867f7a292a98e5740873b5f42f205d7414a0c5a"},{"fixed":"4d9c5bb34f63cd956d15ccafbe584e14280c86a0"},{"fixed":"a750e38635db6a18c5b11599c09f4fd702850423"}],"database_specific":{"extracted_events":[{"strategy":"StringRangeExpression","range":[{"introduced":"29.0.0"},{"fixed":"47.7.4"}],"source":"AFFECTED_FIELD"},{"source":"AFFECTED_FIELD","strategy":"StringRangeExpression","range":[{"introduced":"48.0.0"},{"fixed":"48.5.1"}]},{"range":[{"fixed":"4d9c5bb34f63cd956d15ccafbe584e14280c86a0"}],"source":"REFERENCES_COMMIT"},{"source":"REFERENCES_COMMIT","range":[{"fixed":"a750e38635db6a18c5b11599c09f4fd702850423"}]},{"source":"REFERENCES_TAG","original_tag":"v47.7.4","range":[{"fixed":"909a99ede76b640b7b4780fadaff900b8a81a27e"}]},{"original_tag":"v48.5.1","range":[{"fixed":"1867f7a292a98e5740873b5f42f205d7414a0c5a"}],"source":"REFERENCES_TAG"}]}}],"versions":["v48.5.0","v48.4.0","v48.3.1","v48.3.0","v48.2.0","v48.1.1","v48.1.0","v48.0.1","v48.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-116687.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N"}]}