What is GHSA-j4wp-xfvq-c8f7?

GHSA-j4wp-xfvq-c8f7 is a security advisory published by GitHub Security Advisories with High severity. Craft CMS versions before 5.10.12 fail to properly cleanse string-typed field-layout elements,...

Which CVE IDs does GHSA-j4wp-xfvq-c8f7 cover?

GHSA-j4wp-xfvq-c8f7 covers the following CVE IDs: CVE-2026-86730. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-j4wp-xfvq-c8f7?

GHSA-j4wp-xfvq-c8f7 has a CVSS v3 base score of 8.8, published by GitHub Security Advisories.

GHSA-j4wp-xfvq-c8f7HighCVSS 8.8

Craft CMS versions before 5.10.12 fail to properly cleanse string-typed field-layout elements,...

Vendor

GitHub Security Advisories

Published

September 8, 2026

Last Modified

September 8, 2026

🔗 CVE IDs covered (1)

CVE-2026-86730 →

📋 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().

🔗 References (4)

https://github.com/craftcms/cms/security/advisories/GHSA-qj4v-m29p-fj4m
https://nvd.nist.gov/vuln/detail/CVE-2026-86730
https://www.vulncheck.com/advisories/craft-cms-5.0.0-rc1-before-5.10.12-behavior-injection-rce
https://github.com/advisories/GHSA-j4wp-xfvq-c8f7