{"id":"CVE-2026-90918","details":"Joomla! Core - [20260908] - Core - XSS in HTML Mail Templates in Joomla 4.0.0-5.4.8, 6.0.0-6.1.3 - The mail template feature lacks an escaping mechanism, causing XSS vectors in multiple extensions.","aliases":["BIT-joomla-2026-90918"],"modified":"2026-10-08T02:49:03.038373668Z","published":"2026-09-29T17:17:13.890Z","database_specific":{},"references":[{"type":"WEB","url":"https://www.joomla.org/"},{"type":"FIX","url":"https://developer.joomla.org/security-centre/1088-20260908-core-xss-in-html-mail-templates.html"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/joomla/joomla-cms","events":[{"introduced":"5f20de27b9640124ba185670a36ec40ebc9ec3f9"},{"fixed":"e08f97c45440266d7b51bcf1c0739e8f135bab0b"},{"introduced":"0db7d502466ae41242ad761424f76378458fb819"},{"fixed":"0f2d4de4729eb951e0878fec98c7990da07915b2"}],"database_specific":{"source":"CPE_RANGE","cpe":"cpe:2.3:a:joomla:joomla\\!:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"4.0.0"},{"fixed":"5.4.8"},{"introduced":"6.0.0"},{"fixed":"6.1.3"}]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90918.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"}]}