{"id":"CVE-2026-28697","aliases":["GHSA-v47q-jxvr-p68x"],"url":"https://o3.security/vulnerability/CVE-2026-28697","summary":"Craft Affected by Authenticated RCE via \"craft.app.fs.write()\" in Twig Templates","details":"Craft is a content management system (CMS). Prior to 4.17.0-beta.1 and 5.9.0-beta.1, an authenticated administrator can achieve Remote Code Execution (RCE) by injecting a Server-Side Template Injection (SSTI) payload into Twig template fields (e.g., Email Templates). By calling the craft.app.fs.write() method, an attacker can write a malicious PHP script to a web-accessible directory and subsequently access it via the browser to execute arbitrary system commands. This vulnerability is fixed in 4.17.0-beta.1 and 5.9.0-beta.1.","published":"2026-03-04T16:26:37.476Z","modified":"2026-08-12T03:51:35.792289159Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"craftcms/cms","fixedVersion":"5.9.0-beta.1"},{"ecosystem":"Packagist","name":"craftcms/cms","fixedVersion":"4.17.0-beta.1"}],"fix":{"url":"https://github.com/craftcms/cms/commit/9dc2a4a3ec8e9cd5e8c0d1129f36371437519197","label":"craftcms/cms@9dc2a4a"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28697.json"},{"type":"ADVISORY","url":"https://github.com/craftcms/cms/security/advisories/GHSA-v47q-jxvr-p68x"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-28697"},{"type":"FIX","url":"https://github.com/craftcms/cms/commit/9dc2a4a3ec8e9cd5e8c0d1129f36371437519197"},{"type":"FIX","url":"https://github.com/craftcms/cms/pull/18216"},{"type":"FIX","url":"https://github.com/craftcms/cms/pull/18219"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:35.792289159Z"}}