Vulnerability in Craftcms Cms
CVE-2026-112777
Craft CMS 4.x before 4.18.8 and 5.x before 5.11.0 contains a blocklist bypass in the Twig create() function because its class-name checks are case-sensitive while PHP class resolution is not. Attackers with template-execution rights, such as Control Panel administrators, can instantiate SplFileObject via a lowercase class name to read .env secrets or write a PHP file into the webroot for remote code execution.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/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-w643-x88w-6wcm (vendor-advisory)
- www.vulncheck.com/advisories/craft-cms-before-4.18.8-and-5.11.0-twig-create-blo… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-112777?
- CVE-2026-112777 is a high-severity vulnerability in Craftcms Cms, classified under Incomplete List of Disallowed Inputs. CVSS score: 7.2/10. Published 2026-10-19.
- How severe is CVE-2026-112777?
- High severity. CVSS v3 base score is 7.2 out of 10.