CVE-2026-27126 Craft CMS has Stored XSS in Table Field via "HTML" Column Type
Stored XSS in Craft CMS Table Field allows admin attackers to execute JavaScript when other users view malicious content.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-27126?
CVE-2026-27126 is a medium-severity cross-site scripting vulnerability in Craftcms Craft Cms, published on 24 Feb 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Craft is a content management system (CMS). In versions 4.5.0-RC1 through 4.16.18 and 5.0.0-RC1 through 5.8.22, a stored Cross-site Scripting (XSS) vulnerability exists in the `editableTable.twig` component when using the `html` column type. The application fails to sanitize the input, allowing an attacker to execute arbitrary JavaScript when another user views a page with the malicious table field. In order to exploit the vulnerability, an attacker must have an administrator account, and `allowAdminChanges` must be enabled in production, which is against Craft's security recommendations. Versions 4.16.19 and 5.8.23 patch the issue.
Weakness: CWE-79
Which versions are affected by CVE-2026-27126?
4 open source packages ship an affected version, including craftcms/cms. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
craftcms/cms Packagist | From 4.5.0-RC1 | 4.16.19 |
craftcms/cms Packagist | From 4.5.0-RC1 | 4.16.19 |
craftcms/cms Packagist | From 5.0.0-RC1 | 5.8.23 |
craftcms/cms Packagist | From 5.0.0-RC1 | 5.8.23 |
Products include Craftcms Craft Cms.
How do I fix CVE-2026-27126?
Upgrade craftcms/cms to a fixed version for your release line: 4.16.19 or 5.8.23.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-27126 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-27126 exists.
Other vulnerabilities in Craftcms Craft Cms
Sources
Also known as GHSA-3jh3-prx3-w6wc.