{"action":"Upgrade craftcms/cms to 5.9.21 or later.","affected":[{"fixed":"5.9.21","introduced":"5.7.0"}],"component":"craftcms/cms","cve_ids":["CVE-2026-50281"],"ecosystem":"Packagist","epss":0.00429,"exploited":false,"fixed_versions":["5.9.21"],"ghsa_id":"GHSA-x5m4-g2cq-52pq","id":"tcs_01M5KFAPCA16QPV44QSSQJ4AES","modified_at":"2026-09-10T03:51:12.479494116Z","published_at":"2026-07-02T20:03:36Z","references":["https://osv.dev/vulnerability/GHSA-x5m4-g2cq-52pq","https://github.com/craftcms/cms/security/advisories/GHSA-x5m4-g2cq-52pq","https://nvd.nist.gov/vuln/detail/CVE-2026-50281","https://github.com/craftcms/cms/commit/8f6587c25050bbb6e080d59c71f6bb8932fc8600","https://github.com/craftcms/cms"],"severity":{"label":"high"},"sources":[{"source":"osv","source_id":"GHSA-x5m4-g2cq-52pq","url":"https://osv.dev/vulnerability/GHSA-x5m4-g2cq-52pq"}],"summary":"Craft CMS's mass assignment via id in newAttributes during bulk duplicate overwrites existing elements"}