Vulnerability · Published Oct 19, 2026 · Assigned by VulnCheck

CVE-2026-112774Craft CMS 5.8.0 before 5.11.0 Admin RCE via ContentBlock Field Layout

High 7.2

In plain English

A high-severity code injection in cms from craftcms. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 51% of all known vulnerabilities).

Severity (CVSS 3.1)7.2High

Exploit odds (30 days)0.6%top 49.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Craft CMS from 5.8.0 before 5.11.0 contains a remote code execution vulnerability that allows authenticated administrators to inject Yii behaviors by supplying a JSON-string field layout to ContentBlock::setFieldLayout(). Attackers with allowAdminChanges enabled can include 'as X' or 'on X' keys that bypass cleanseConfig() to execute OS commands as the web user and disclose secrets.

Affected products (as reported)

Vendor	Product	Versions
craftcms	cms	5.8.0 – before 5.11.0

Weakness: CWE-94 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

References

GitHub Security Advisory (GHSA-j6r9-fxgv-j7x5) vendor-advisory
VulnCheck Advisory: Craft CMS 5.8.0 before 5.11.0 Admin RCE via ContentBlock Field Layout third-party-advisory