EUVD-2026-329239

fkie_cve-2026-56383

Craft CMS contains a stored cross-site scripting (XSS) vulnerability in the editableTable.twig component when using the 'Row Heading' column type. The application fails to sanitize input within row heading default values, allowing an attacker with an administrator account (with allowAdminChanges enabled) to inject arbitrary JavaScript that executes when another user views a page containing the affected table field. Affected versions are >= 4.5.0-beta.1 through 4.16.18 and >= 5.0.0-RC1 through 5.8.22; fixed in 4.16.19 and 5.8.23.

GHSA-6j87-m5qx-9fqp — Craft CMS has Stored XSS in Table Field in its "Row Heading" Column Type

Affected: Packagist: craftcms/cms

A stored Cross-site Scripting (XSS) vulnerability exists in the `editableTable.twig` component when using the `Row Heading` column type. The application fails to sanitize input within row headings, allowing an attacker to execute arbitrary JavaScript when another user views a page with the malicious table field.

## Prerequisites * An administrator account * `allowAdminChanges` must be enabled in production, which is [against security recommendations](https://craftcms.com/knowledge-base/securing-craft#set-allowAdminChanges-to-false-in-production).

## Steps to Reproduce 1. Navigate to **Settings** → **Fields** and create a new field with Type: **Table** 1. Add a **Column Heading** and set **Column Type** to `Row Heading` 1. In **Default Values** section, add a row with the following payload: ```html <img src=x onerror="alert('XSS')"> ``` 1. Enable `Static Rows` 1. Use the field in any object (e.g., user profile fields) → then visit any user’s profile 1. Notice the XSS execution

## Resources

https://github.com/craftcms/cms/commit/7b372de262b8d9d2ce859f32780c3715719b6f5a

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EUVD-2026-329239

fkie_cve-2026-56383

GHSA-6j87-m5qx-9fqp — Craft CMS has Stored XSS in Table Field in its "Row Heading" Column Type