{"id":"CVE-2026-71573","details":"Joomla! Core - [20260802] - Improper CORS origin validation in Joomla 4.0.0-5.4.7, 6.0.0-6.1.2 - An improper implementation prevented configured CORS origins from being properly validated in CORS requests.","aliases":["BIT-joomla-2026-71573"],"modified":"2026-09-05T08:04:51.170466Z","published":"2026-08-18T17:17:02.243Z","references":[{"type":"WEB","url":"https://www.joomla.org/"},{"type":"ADVISORY","url":"https://developer.joomla.org/security-centre/20260802-core-improper-cors-origin-validation.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-2026-71573.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L"}]}