Remote Code Execution Vulnerability in Craft CMS by Craft
CVE-2026-25498

8.6HIGH

Key Information:

Vendor

Craftcms

Status
Cms
Vendor
CVE Published:
9 February 2026

What is CVE-2026-25498?

Craft CMS exhibits a vulnerability where the function assembleLayoutFromPost() within src/services/Fields.php does not properly sanitize input from users. This flaw allows authenticated administrators to execute arbitrary commands on the server by injecting harmful Yii2 behavior configurations. The affected versions are 4.0.0-RC1 through 4.16.17 and 5.0.0-RC1 through 5.8.21. This is a new variant of a previously resolved behavior injection issue documented in CVE-2025-68455, which exploits different code execution paths. Users are encouraged to update to Craft CMS version 5.8.22 or later for protection.

Affected Version(s)

cms >= 5.0.0-RC1, < 5.8.22 < 5.0.0-RC1, 5.8.22

cms >= 4.0.0-RC1, < 4.16.18 < 4.0.0-RC1, 4.16.18

References

https://github.com/craftcms/cms/security/advisories/GHSA-...
x_refsource_CONFIRM
https://github.com/craftcms/cms/commit/395c64f0b80b507be1...
x_refsource_MISC
https://github.com/craftcms/cms/releases/tag/5.8.22
x_refsource_MISC

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.