{"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-2026-28783"],"ecosystem":"Packagist","epss":0.00512,"exploited":false,"fixed_versions":["5.9.0-beta.1","4.17.0-beta.1"],"ghsa_id":"GHSA-5fvc-7894-ghp4","id":"tcs_01M5KEW0Z5JQE9GTKGHRZZ06QP","modified_at":"2026-03-04T18:48:54.658875Z","published_at":"2026-03-03T21:01:27Z","references":["https://osv.dev/vulnerability/GHSA-5fvc-7894-ghp4","https://github.com/craftcms/cms/security/advisories/GHSA-5fvc-7894-ghp4","https://nvd.nist.gov/vuln/detail/CVE-2026-28783","https://github.com/craftcms/cms/pull/18208","https://github.com/craftcms/cms","https://github.com/twigphp/Twig/blob/946ddeafa3c9f4ce279d1f34051af041db0e16f2/src/Extension/CoreExtension.php#L2096"],"severity":{"label":"critical","score":9.1},"sources":[{"source":"osv","source_id":"GHSA-5fvc-7894-ghp4","url":"https://osv.dev/vulnerability/GHSA-5fvc-7894-ghp4"},{"source":"nvd","source_id":"CVE-2026-28783","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-28783"}],"summary":"Craft CMS has Twig Function Blocklist Bypass"}