SEPTEMBER 17, 2026
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Case File

CVE-2026-86730

HIGH · CVSS 8.8 EPSS 0.39% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-08 · Last synced 2026-09-17

CyberRota Analysis

AI-Generated

Craft CMS versions prior to 5.10.12 are vulnerable due to inadequate cleansing of string-typed field-layout elements, enabling authenticated users to inject malicious Yii2 behavior attachments and event handlers. This flaw allows attackers to bypass validation and execute arbitrary code through object instantiation, posing a significant risk to the integrity of the application. Organizations using affected versions should prioritize remediation to mitigate potential exploitation risks.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
code execution
GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-86730
Severity
HIGH
CVSS
8.8
EPSS
0.39%

Original NVD Description

Craft CMS versions before 5.10.12 fail to properly cleanse string-typed field-layout elements, allowing authenticated control-panel users to inject Yii2 behavior attachments and event handlers. Attackers can post field-layout tab elements as JSON strings to bypass cleanse validation, then trigger arbitrary object instantiation and code execution through Craft::createObject().