{"id":"UBUNTU-CVE-2026-28343","details":"CKEditor 5 is a modern JavaScript rich-text editor with an MVC architecture. Starting in version 29.0.0 and prior to version 47.6.0, a cross-site scripting (XSS) vulnerability has been discovered in the General HTML Support feature. This vulnerability could be triggered by inserting specially crafted markup, leading to unauthorized JavaScript code execution, if the editor instance used an unsafe General HTML Support configuration. This issue has been patched in version 47.6.0.","modified":"2026-09-16T14:01:34.213075259Z","published":"2026-03-05T20:16:00Z","upstream":["CVE-2026-28343"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-28343"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-28343"},{"type":"REPORT","url":"https://github.com/ckeditor/ckeditor5/releases/tag/v47.6.0"},{"type":"REPORT","url":"https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-jrqm-vmqc-gm93"}],"affected":[{"package":{"name":"ckeditor","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/ckeditor?arch=source&distro=esm-apps%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.4.4+dfsg1-3","4.5.6+dfsg-1","4.5.7+dfsg-1","4.5.7+dfsg-2","4.5.7+dfsg-2ubuntu0.16.04.1~esm1","4.5.7+dfsg-2ubuntu0.16.04.1~esm2","4.5.7+dfsg-2ubuntu0.16.04.1~esm3"],"ecosystem_specific":{"binaries":[{"binary_version":"4.5.7+dfsg-2ubuntu0.16.04.1~esm3","binary_name":"ckeditor"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-28343.json"}},{"package":{"name":"ldap-account-manager","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/ldap-account-manager?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.9-1","5.1-1","5.2-1","5.2-1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_version":"5.2-1ubuntu1","binary_name":"ldap-account-manager"},{"binary_version":"5.2-1ubuntu1","binary_name":"ldap-account-manager-lamdaemon"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-28343.json"}},{"package":{"name":"request-tracker4","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/request-tracker4?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.2.11-2","4.2.12-3","4.2.12-4","4.2.12-5"],"ecosystem_specific":{"binaries":[{"binary_version":"4.2.12-5","binary_name":"request-tracker4"},{"binary_version":"4.2.12-5","binary_name":"rt4-apache2"},{"binary_version":"4.2.12-5","binary_name":"rt4-clients"},{"binary_name":"rt4-db-mysql","binary_version":"4.2.12-5"},{"binary_name":"rt4-db-postgresql","binary_version":"4.2.12-5"},{"binary_version":"4.2.12-5","binary_name":"rt4-db-sqlite"},{"binary_name":"rt4-doc-html","binary_version":"4.2.12-5"},{"binary_name":"rt4-fcgi","binary_version":"4.2.12-5"},{"binary_name":"rt4-standalone","binary_version":"4.2.12-5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-28343.json"}},{"package":{"name":"ckeditor","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/ckeditor?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.5.7+dfsg-2","4.5.7+dfsg-2ubuntu0.18.04.1","4.5.7+dfsg-2ubuntu0.18.04.1+esm1","4.5.7+dfsg-2ubuntu0.18.04.1+esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"ckeditor","binary_version":"4.5.7+dfsg-2ubuntu0.18.04.1+esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-28343.json"}},{"package":{"name":"ckeditor3","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/ckeditor3?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.6.6.1+dfsg-1"],"ecosystem_specific":{"binaries":[{"binary_name":"ckeditor3","binary_version":"3.6.6.1+dfsg-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-28343.json"}},{"package":{"name":"ldap-account-manager","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/ldap-account-manager?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.7-1","6.1-1","6.2-1"],"ecosystem_specific":{"binaries":[{"binary_name":"ldap-account-manager","binary_version":"6.2-1"},{"binary_name":"ldap-account-manager-lamdaemon","binary_version":"6.2-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-28343.json"}},{"package":{"name":"request-tracker4","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/request-tracker4?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.4.1-5","4.4.2-1","4.4.2-2","4.4.2-2ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"4.4.2-2ubuntu0.1~esm1","binary_name":"request-tracker4"},{"binary_version":"4.4.2-2ubuntu0.1~esm1","binary_name":"rt4-apache2"},{"binary_name":"rt4-clients","binary_version":"4.4.2-2ubuntu0.1~esm1"},{"binary_name":"rt4-db-mysql","binary_version":"4.4.2-2ubuntu0.1~esm1"},{"binary_name":"rt4-db-postgresql","binary_version":"4.4.2-2ubuntu0.1~esm1"},{"binary_name":"rt4-db-sqlite","binary_version":"4.4.2-2ubuntu0.1~esm1"},{"bina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