Vulnerability in Craftcms Cms
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.011 (64.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: +0.000
Affected products
- Craftcms Cms — versions >= 5.0.0-RC1, < 5.9.0-beta.1, >= 4.0.0-RC1, < 4.17.0-beta.1
- Craftcms Craft Cms — versions 4.0.0, 5.0.0
Weakness classification (CWE)
References
- github.com/craftcms/cms/security/advisories/GHSA-v47q-jxvr-p68x (Exploit, Patch, Mitigation, Vendor Advisory)
- github.com/craftcms/cms/pull/18216 (Patch, Issue Tracking)
- github.com/craftcms/cms/pull/18219 (Patch, Issue Tracking)
- github.com/craftcms/cms/commit/9dc2a4a3ec8e9cd5e8c0d1129f36371437519197 (Patch)
Frequently asked questions
- What is CVE-2026-28697?
- CVE-2026-28697 is a critical-severity vulnerability in Craftcms Cms, classified under Improper Neutralization of Special Elements Used in a Template Engine. CVSS score: 9.1/10. Published 2026-03-04.
- How severe is CVE-2026-28697?
- Critical severity. CVSS v3 base score is 9.1 out of 10.