CVE-2026-112777
Craft CMS before 4.18.8 and 5.11.0 Twig create() Blocklist Bypass Leading to RCE
CVSS Score
7.2
EPSS Score
0.0%
EPSS Percentile
0th
Craft CMS 4.x before 4.18.8 and 5.x before 5.11.0 contains a blocklist bypass in the Twig create() function because its class-name checks are case-sensitive while PHP class resolution is not. Attackers with template-execution rights, such as Control Panel administrators, can instantiate SplFileObject via a lowercase class name to read .env secrets or write a PHP file into the webroot for remote code execution.
| CWE | CWE-184 |
| Vendor | craftcms |
| Product | cms |
| Published | Oct 19, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
craftcms / cms
4.0.0 < 4.18.8
craftcms / cms
5.0.0 < 5.11.0