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    CVE-2026-86730

    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().

    Published:Sep 8, 2026
    Last Modified:Sep 8, 2026
    EPS:Sep 8, 2026
    EPSS Score:
    CVSS Score:8.8

    Affected Products

    Vendor
    Craftcms
    Product
    Cms
    Vendor
    Craftcms
    Product
    Craft Cms

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-79987 (CVSS 8.7) — A remote, authenticated, non-admin Craft CMS Control Panel user with only the accessCp permission can execute …
    CVE-2026-86732 (CVSS 8.7) — Craft CMS versions before 5.10.12 contain a remote code execution vulnerability in the element-index endpoint …
    CVE-2026-79991 (CVSS 7.1) — Craft CMS GraphQL entry mutation resolvers (saveEntry, deleteEntry) read siteIddirectly from$argumentswithout …
    CVE-2026-79990 (CVSS 8.7) — Craft CMS GraphQL entry mutation resolvers (saveEntry, deleteEntry) read siteIddirectly from$argumentswithout …
    CVE-2026-79989 (CVSS 8.7) — The vulnerability allows any authenticated user to change their own password without providing the current pas…
    CVE-2026-79988 (CVSS 8.7) — The Twig sandbox mechanism in Craft CMS is configured to allow dangerous functionality from the Yii framework,…
    CVE-2026-78416 (CVSS 8.7) — Craft CMS versions from 4.0.0-RC1 before 4.18.2 and from 5.0.0-RC1 before 5.10.6 contain an authenticated remo…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High