Answer in brief
CVE-2026-112777 records a High severity (CVSS 8.7) vulnerability in Craft CMS before 4.18.8 and 5.11.0 Twig create() Blocklist Bypass Leading to RCE. The current sources do not mark it as known exploited. The current feed maps craftcms/cms (generic), craftcms/cms (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps craftcms/cms (generic), craftcms/cms (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| craftcms/cmsgeneric | >=4.0.0 <4.18.8 | 4.18.8 |
| craftcms/cmsgeneric | >=5.0.0 <5.11.0 | 5.11.0 |
Published upstream
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 19, 2026
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.
Quoted source text, attributed separately from HOL analysis.