{"id":"GHSA-44q4-354f-c826","aliases":["CVE-2026-8435"],"title":"Concrete CMS is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/backend/file approveVersion()","titleSource":"OSV","descriptionSource":"OSV","declaredSeverity":"LOW","description":"Concrete CMS 9 through 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/backend/file approveVersion().","severity":"low","score":2.3,"published":"2026-05-22T00:31:17.000Z","modified":"2026-09-10T03:51:04.483Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Packagist","name":"concrete5/concrete5","sources":[{"name":"OSV · GHSA-44q4-354f-c826","url":"https://osv.dev/vulnerability/GHSA-44q4-354f-c826"}],"ranges":[{"events":[{"introduced":"9.0.0RC1"},{"fixed":"9.5.1"}],"type":"ECOSYSTEM"}],"versions":["9.0.0","9.0.0RC1","9.0.0RC3","9.0.0RC4","9.0.1","9.0.2","9.1.0","9.1.1","9.1.2","9.1.3","9.2.0","9.2.0RC2","9.2.1","9.2.2","9.2.3","9.2.4","9.2.5","9.2.6","9.2.7","9.2.8","9.2.9","9.3.0","9.3.1","9.3.2","9.3.3","9.3.4","9.3.5","9.3.6","9.3.7","9.3.8","9.3.9","9.4.0","9.4.0RC1","9.4.0RC2","9.4.1","9.4.2","9.4.3","9.4.4","9.4.5","9.4.6","9.4.7","9.4.8","9.5.0","9.5.0RC1","9.5.0RC2"],"fixed":["9.5.1"]}],"sourceAffected":[],"references":["https://nvd.nist.gov/vuln/detail/CVE-2026-8435","https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes","https://github.com/concretecms/concretecms"],"sources":[{"name":"OSV","id":"GHSA-44q4-354f-c826","modified":"2026-09-10T03:51:04.483910584Z","url":"https://osv.dev/vulnerability/GHSA-44q4-354f-c826"}],"assessments":[{"source":"OSV","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":2.3}],"products":[],"remediation":[],"kev":{"status":"not-listed","checkedAt":"2026-10-28T19:15:31.108Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}