CVE-2026-28697
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.
- Score
- CVSS 4.0 9.4 Critical
- Status
- Analyzed - security-advisories@github.com
- Published
- 2026-03-04
- Last modified
- 2026-03-06
- Weaknesses
- CWE-1336
Affected products
References
- https://github.com/craftcms/cms/commit/9dc2a4a3ec8e9cd5e8c0d1129f36371437519197
- https://github.com/craftcms/cms/pull/18216
- https://github.com/craftcms/cms/pull/18219
- https://github.com/craftcms/cms/security/advisories/GHSA-v47q-jxvr-p68x
