CVE-2026-112777CWE-184

CVE-2026-112777

High · published October 20, 2026

CVSS v3.1
7.2
EPSS
0%
Percentile
41.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.2 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00488 · 41.1th percentile
Weakness
CWE-184 · Incomplete List of Disallowed Inputs
Published
2026-10-20T00:17Z
References (2)
https://github.com/craftcms/cms/security/advisories/GHSA-w643-x88w-6wcm · [email protected]https://www.vulncheck.com/advisories/craft-cms-before-4.18.8-and-5.11.0-twig-create-blocklist-bypass-leading-to-rce · [email protected]
EPSS history
Timeline
  • 21 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 19 OCT 19:10Z
    Craft CMS before 4.18.8 and 5.11.0 Twig create() Blocklist Bypass Leading to RCE
    cvelistv5
  • 19 OCT 19:10Z
    Craft CMS before 4.18.8 and 5.11.0 Twig create() Blocklist Bypass Leading to RCE
    cvelistv5