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CVE PROGRAM SOURCE RECORD8.7 High

CVE-2026-112777

Craft CMS before 4.18.8 and 5.11.0 Twig create() Blocklist Bypass Leading to RCE

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Status
Published
Published
Updated
Assigning organization
VulnCheck

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

craftcms cms

Default version status: unaffected

  • 4.0.0 to < 4.18.8affected
  • 4.18.8unaffected

craftcms cms

Default version status: unaffected

  • 5.0.0 to < 5.11.0affected
  • 5.11.0unaffected

References