CVE CVE-2026-28697

CVE-2026-28697

PHP

Severity: CRITICAL
CVSS: 9.1CVSS
Published: 2026-03-04
Last modified: 2026-03-05
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CWE: CWE-1336

Description

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.

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

Summary

Description

References