Vulnerability · Published Jun 21, 2026 · Assigned by VulnCheck

CVE-2026-56383Craft CMS - Stored XSS in Table Field via Row Heading Column Type

Medium 4.8

In plain English

A medium-severity cross-site scripting in cms from craftcms. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.8Medium

Exploit odds (30 days)0.2%top 87.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Packagist	craftcms/cms	4.16.19	GHSA-6j87-m5qx-9fqp
Packagist	craftcms/cms	5.8.23	GHSA-6j87-m5qx-9fqp

Affected products (as reported)

Vendor	Product	Versions
craftcms	cms	4.5.0-beta.1 – before 4.16.195.0.0-RC1 – before 5.8.23

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

References

GHSA Advisory GHSA-6j87-m5qx-9fqp vendor-advisory
https://github.com/craftcms/cms/commit/7b372de262b8d9d2ce859f32780c3715719b6f5a patch
VulnCheck Advisory: Craft CMS - Stored XSS in Table Field via Row Heading Column Type third-party-advisory