CVE-2026-28697
Critical · 9.1CVSS
9.1
EPSS
1.2%
Published
Mar 4, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| Packagist | craftcms/cms | 4.0.0-RC1 | 4.17.0-beta.1 |
| Packagist | craftcms/cms | 5.0.0-RC1 | 5.9.0-beta.1 |
Related vulnerabilities
- GHSA-v47q-jxvr-p68x Craft CMS Vulnerable to Authenticated RCE via "craft.app.fs.write()" in Twig Templates Same vulnerability
- GHSA-234q-vvw3-mrfq Craft CMS has unauthenticated activation email trigger with potential user enumeration Also affects craftcms/cms
- CVE-2026-29069 Craft is a content management system (CMS). Also affects craftcms/cms
- CVE-2026-28696 Craft is a content management system (CMS). Also affects craftcms/cms
- CVE-2026-28781 Craft is a content management system (CMS). Also affects craftcms/cms
- CVE-2026-28784 Craft is a content management system (CMS). Also affects craftcms/cms
- CVE-2026-28782 Craft is a content management system (CMS). Also affects craftcms/cms
- CVE-2026-28783 Craft is a content management system (CMS). Also affects craftcms/cms