{"id":"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.","aliases":["GHSA-v47q-jxvr-p68x"],"modified":"2026-04-10T05:41:24.216986Z","published":"2026-03-04T16:26:37.476Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-1336"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28697.json"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/craftcms/cms","events":[{"introduced":"04755d93f86d07cc183db47db8a0eee106892e30"},{"fixed":"0ad14c3c7e590461b52aeb44859659e2e231e04d"}],"database_specific":{"versions":[{"introduced":"5.0.0-RC1"},{"fixed":"5.9.0-beta.1"}]}},{"type":"GIT","repo":"https://github.com/craftcms/cms","events":[{"introduced":"daac7c1da2f701f2e9ddee1da1457ce61660b581"},{"fixed":"42cef196d68dd8d48ceaab89b2c9e2edd2cecbe8"}],"database_specific":{"versions":[{"introduced":"4.0.0-RC1"},{"fixed":"4.17.0-beta.1"}]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-28697.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H"}]}