{"action":"Upgrade concrete5/concrete5 to 9.5.1 or later.","affected":[{"fixed":"9.5.1","introduced":"0"}],"component":"concrete5/concrete5","cve_ids":["CVE-2026-8340"],"ecosystem":"Packagist","epss":0.00103,"exploited":false,"fixed_versions":["9.5.1"],"ghsa_id":"GHSA-xjg6-5v39-v7fc","id":"tcs_01M5KFB485SMAR515T9SEW9A0D","modified_at":"2026-09-10T03:50:48.027640185Z","published_at":"2026-05-26T13:30:17Z","references":["https://osv.dev/vulnerability/GHSA-xjg6-5v39-v7fc","https://nvd.nist.gov/vuln/detail/CVE-2026-8340","https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes","https://github.com/concretecms/concretecms"],"severity":{"label":"medium","score":4.3},"sources":[{"source":"osv","source_id":"GHSA-xjg6-5v39-v7fc","url":"https://osv.dev/vulnerability/GHSA-xjg6-5v39-v7fc"},{"source":"nvd","source_id":"CVE-2026-8340","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-8340"}],"summary":"Concrete CMS is vulnerable to CSRF via Backend\\File::approveVersion"}