Craft CMS Vulnerable to potential authenticated Remote Code Execution via malicious attached Behavior

Relationship to Previously Patched Vulnerability This vulnerability is in addition to the RCE vulnerability patched in GHSA-255j-qw47-wjh5. That advisory addressed a similar RCE vulnerability that affected two specific routes: - /index.php?p=admin%2Factions%2Ffields%2Fapply-layout-element-setting...

CVE-2026-25498 Craft has a potential authenticated Remote Code Execution via malicious attached Behavior

Craft is a platform for creating digital experiences. In versions 4.0.0-RC1 through 4.16.17 and 5.0.0-RC1 through 5.8.21, a Remote Code Execution RCE vulnerability exists in Craft CMS where the assembleLayoutFromPost function in src/services/Fields.php fails to sanitize user-supplied configuratio...

CVE-2026-25498

Craft CMS versions 4.0.0-RC1 through 4.16.17 and 5.0.0-RC1 through 5.8.21 contain a Remote Code Execution (RCE) flaw in assembleLayoutFromPost() where user-supplied configuration data is not sanitized before passing to Craft::createObject(). This allows authenticated administrators to inject mali...

CVE-2026-25498 Craft has a potential authenticated Remote Code Execution via malicious attached Behavior

Craft is a platform for creating digital experiences. In versions 4.0.0-RC1 through 4.16.17 and 5.0.0-RC1 through 5.8.21, a Remote Code Execution RCE vulnerability exists in Craft CMS where the assembleLayoutFromPost function in src/services/Fields.php fails to sanitize user-supplied configuratio...

PT-2026-7148

Name of the Vulnerable Software and Affected Versions Craft CMS versions 4.0.0-RC1 through 4.16.17 Craft CMS versions 5.0.0-RC1 through 5.8.21 Description A Remote Code Execution RCE vulnerability exists in Craft CMS where the assembleLayoutFromPost function in src/services/Fields.php does not...