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
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-15440548
- published10 Mar 2026
- disclosed3 Mar 2026
- creditHesham
Introduced: 3 Mar 2026
NewCVE-2026-28783 (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 Twig function blocklist bypass. An attacker can execute arbitrary code, read files, or perform server-side request forgery by invoking unblocked PHP functions through non-Closure arrow functions in Twig, provided they have sufficient permissions, such as a compromised admin account, access to the System Messages utility, or allowAdminChanges enabled on production. This is only exploitable if one of these conditions is met.