CVE-2026-56383

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.

PUBLISHED Reserved 2026-06-21 | Published 2026-06-21 | Updated 2026-06-23 | Assigner VulnCheck

Problem types

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

Credits

mHe4am reporter

References

github.com/...ms/cms/security/advisories/GHSA-6j87-m5qx-9fqp exploit

github.com/...ms/cms/security/advisories/GHSA-6j87-m5qx-9fqp (GHSA Advisory GHSA-6j87-m5qx-9fqp) vendor-advisory

github.com/...ommit/7b372de262b8d9d2ce859f32780c3715719b6f5a patch

www.vulncheck.com/...table-field-via-row-heading-column-type (VulnCheck Advisory: Craft CMS - Stored XSS in Table Field via Row Heading Column Type) third-party-advisory

cve.org (CVE-2026-56383)

nvd.nist.gov (CVE-2026-56383)

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