{"action":"Upgrade october/system to 3.7.17 or later.","affected":[{"fixed":"3.7.17","introduced":"0"},{"fixed":"4.2.23","introduced":"4.0.0"}],"component":"october/system","cve_ids":["CVE-2026-49400"],"ecosystem":"Packagist","epss":0.00237,"exploited":false,"fixed_versions":["3.7.17","4.2.23"],"ghsa_id":"GHSA-2ff2-mx52-q8wp","id":"tcs_01M5KERWXS50P3GTE789M1T6PK","modified_at":"2026-09-14T18:15:05.119996963Z","published_at":"2026-09-14T17:08:06Z","references":["https://osv.dev/vulnerability/GHSA-2ff2-mx52-q8wp","https://github.com/octobercms/october/security/advisories/GHSA-2ff2-mx52-q8wp","https://github.com/octobercms/october"],"severity":{"label":"low","score":3.3},"sources":[{"source":"osv","source_id":"GHSA-2ff2-mx52-q8wp","url":"https://osv.dev/vulnerability/GHSA-2ff2-mx52-q8wp"}],"summary":"October CMS: PHP Object Injection via Backend Widget Session Storage"}