CVE-2026-112777

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Source
https://cve.org/CVERecord?id=CVE-2026-112777
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-112777.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-112777
Aliases
  • GHSA-w643-x88w-6wcm
Published
2026-10-19T19:10:54Z
Modified
2026-10-20T11:18:27Z
Severity
  • 8.7 (High) CVSS_V4 - 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 CVSS Calculator
Summary
Craft CMS before 4.18.8 and 5.11.0 Twig create() Blocklist Bypass Leading to RCE
Details

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.

Database specific 
{
    "cna_assigner":  "VulnCheck",
    "cwe_ids":  [
        "CWE-184"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/112xxx/CVE-2026-112777.json"
}
References

Affected packages

Git / github.com/craftcms/cms

Affected ranges

Type
GIT
Repo
https://github.com/craftcms/cms
Events
Introduced
982efcd14d7e93a1a54f0905b61f242de6b53d8a
Fixed
feda70e264a9330919bea9eb607148198135afd4
Introduced
f6a8fb685d44e387435825e3a96809eeda4973a6
Fixed
2255717bfd5cc502751601aa68bf72eea035cd47
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "4.0.0"
        },
        {
            "fixed":  "4.18.8"
        },
        {
            "introduced":  "5.0.0"
        },
        {
            "fixed":  "5.11.0"
        }
    ],
    "source":  "AFFECTED_FIELD"
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-112777.json"