CVE-2026-27126: Craft CMS has Stored XSS in Table Field via "HTML" Column Type

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-02-24 · updated 2026-06-17
Weakness: CWE-79

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.

Affected products

craftcms cms: from 4.5.0 (excl.) before 4.16.19; from 5.0.0 (excl.) before 5.8.23; 4.5.0, 4.5.0-rc1, 5.0.0, 5.0.0-rc1 — fixed in 4.16.19, 5.8.23

How to fix

Upgrade to a fixed version: craftcms cms 4.16.19, 5.8.23. Check the vendor advisory for mitigations.

References

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