Critical severity9.1NVD Advisory· Published Mar 4, 2026· Updated Jun 17, 2026
CVE-2026-28697
CVE-2026-28697
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
craftcms/cmsPackagist | >= 5.0.0-RC1, < 5.9.0-beta.1 | 5.9.0-beta.1 |
craftcms/cmsPackagist | >= 4.0.0-RC1, < 4.17.0-beta.1 | 4.17.0-beta.1 |
Affected products
9cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:*+ 6 more
- cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:*range: >4.0.0,<4.17.0
- cpe:2.3:a:craftcms:craft_cms:4.0.0:-:*:*:*:*:*:*
- cpe:2.3:a:craftcms:craft_cms:4.0.0:rc1:*:*:*:*:*:*
- cpe:2.3:a:craftcms:craft_cms:4.0.0:rc2:*:*:*:*:*:*
- cpe:2.3:a:craftcms:craft_cms:4.0.0:rc3:*:*:*:*:*:*
- cpe:2.3:a:craftcms:craft_cms:5.0.0:-:*:*:*:*:*:*
- cpe:2.3:a:craftcms:craft_cms:5.0.0:rc1:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
6- github.com/craftcms/cms/commit/9dc2a4a3ec8e9cd5e8c0d1129f36371437519197nvdPatchWEB
- github.com/craftcms/cms/pull/18216nvdIssue TrackingPatchWEB
- github.com/craftcms/cms/pull/18219nvdIssue TrackingPatchWEB
- github.com/craftcms/cms/security/advisories/GHSA-v47q-jxvr-p68xnvdExploitMitigationPatchVendor AdvisoryWEB
- github.com/advisories/GHSA-v47q-jxvr-p68xghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-28697ghsaADVISORY
News mentions
0No linked articles in our index yet.