RCE in Craftcms Cms
CVE-2026-112770
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.
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/craftcms/cms/security/advisories/GHSA-xmwr-88vw-5ghh (vendor-advisory)
- www.vulncheck.com/advisories/craft-cms-before-4.18.8-and-5.11.0-authenticated-r… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-112770?
- CVE-2026-112770 is a high-severity vulnerability in Craftcms Cms, classified under Code Injection. CVSS score: 8.8/10. Published 2026-10-19.
- How severe is CVE-2026-112770?
- High severity. CVSS v3 base score is 8.8 out of 10.