Template Injection Affecting craftcms/cms package, versions >=4.0.0-RC1, <4.17.0-beta.1>=5.0.0-RC1, <5.9.0-beta.1
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PHP-CRAFTCMSCMS-15440544
- published10 Mar 2026
- disclosed3 Mar 2026
- creditHesham
Introduced: 3 Mar 2026
NewCVE-2026-28697 (opens in a new tab)How to fix?
Upgrade craftcms/cms to version 4.17.0-beta.1, 5.9.0-beta.1 or higher.
Overview
craftcms/cms is a content management system.
Affected versions of this package are vulnerable to Template Injection via the craft.app.fs.write function in Twig templates. An attacker can execute arbitrary system commands and disclose sensitive information by injecting malicious payloads into template fields, which are then rendered and written to a web-accessible directory.
Note: This is only exploitable if the attacker has an authenticated administrator account with allowAdminChanges enabled or access to the System Messages utility.