CVE-2026-112770

High

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.

SeverityHigh

CVSS8.8

Exploit probability—

ProductCms

PublishedOct 19, 2026

First seenOct 19, 2026

Weakness typeCWE-94Code injection

How to fix

Update

craftcms cms4.18.8, 5.11.0 or later

Vendor advisories

github.com/craftcms/cms/security/advisories/GHSA-xmwr-88vw-5ghh

Affected products

Product	Affected versions	Fixed in
craftcms cms	4.0.0 ≤ v < 4.18.8, 5.0.0 ≤ v < 5.11.0	4.18.8, 5.11.0

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