Vulnerability · Published Oct 19, 2026 · Assigned by VulnCheck

CVE-2026-112770Craft CMS before 4.18.8 and 5.11.0 Authenticated RCE via Twig group Filter Array-Callable

High 8.8

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 0.7% (higher than 54% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.7%top 46.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Craft CMS 4.x before 4.18.8 and 5.x before 5.11.0 contains a remote code execution vulnerability in the Twig group filter, which invokes non-string arrow arguments as callables without the checkArrow guard used by other arrow-accepting filters. Authenticated control panel users can pass an array-callable such as FileHelper::writeToFile via element-select condition rules to write a webshell to the webroot and execute code as the web user.

Affected products (as reported)

Vendor	Product	Versions
craftcms	cms	4.0.0 – before 4.18.8
craftcms	cms	5.0.0 – before 5.11.0

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

References

GitHub Security Advisory (GHSA-xmwr-88vw-5ghh) vendor-advisory
VulnCheck Advisory: Craft CMS before 4.18.8 and 5.11.0 Authenticated RCE via Twig group Filter Array-Callable third-party-advisory