CVE-2026-28695
HIGH
GHSA-94rc-cqvm-m4pw
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
4Description
Craft is a content management system (CMS). There is an authenticated admin RCE in Craft CMS 5.8.21 via Server-Side Template Injection using the create() Twig function combined with a Symfony Process gadget chain. The create() Twig function exposes Craft::createObject(), which allows instantiation of arbitrary PHP classes with constructor arguments. Combined with the bundled symfony/process dependency, this enables RCE. This bypasses the fix implemented for CVE-2025-57811 (patched in 5.8.7). This vulnerability is fixed in 5.9.0-beta.1 and 4.17.0-beta.1.
Analysis
Remote code execution in Craft CMS 5.8.21 allows authenticated administrators to execute arbitrary PHP code through Server-Side Template Injection in the create() Twig function combined with Symfony Process gadget chains. Public exploit code exists for this vulnerability, which bypasses the previous patch for CVE-2025-57811. …
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Remediation
Within 24 hours: Identify all Craft CMS 5.8.21 instances in your environment and restrict admin portal access to trusted IP ranges. Within 7 days: Apply the available vendor patch to all affected systems and verify successful deployment. …
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External POC / Exploit Code
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