{"action":"Upgrade craftcms/cms to 4.17.0-beta.1 or later.","affected":[{"fixed":"5.9.0-beta.1","introduced":"5.0.0-RC1"},{"fixed":"4.17.0-beta.1","introduced":"4.0.0-RC1"}],"component":"craftcms/cms","cve_ids":["CVE-2026-56393"],"ecosystem":"Packagist","epss":0.00225,"exploited":false,"fixed_versions":["5.9.0-beta.1","4.17.0-beta.1"],"ghsa_id":"GHSA-4mgv-366x-qxvx","id":"tcs_01M5KEV4D3TF4CNQRN67VJFWWA","modified_at":"2026-08-06T21:45:58.167879623Z","published_at":"2026-03-03T20:58:07Z","references":["https://osv.dev/vulnerability/GHSA-4mgv-366x-qxvx","https://github.com/craftcms/cms/security/advisories/GHSA-4mgv-366x-qxvx","https://nvd.nist.gov/vuln/detail/CVE-2026-56393","https://github.com/craftcms/cms/commit/67780a778c6ec04e68e64a0b1177c168306144a2","https://github.com/craftcms/cms/commit/943152d2246b36f12adf161a03b8695b773d9276","https://github.com/craftcms/cms","https://www.vulncheck.com/advisories/craft-cms-multiple-stored-cross-site-scripting-in-settings-names-and-field-options"],"severity":{"label":"medium","score":4.8},"sources":[{"source":"osv","source_id":"GHSA-4mgv-366x-qxvx","url":"https://osv.dev/vulnerability/GHSA-4mgv-366x-qxvx"},{"source":"nvd","source_id":"CVE-2026-56393","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56393"}],"summary":"Craft CMS Vulnerable to Stored XSS in Settings Names and Field Options"}