CVE-2026-29113: Craft CMS has a potential information disclosure vulnerability in preview tokens

March 10, 2026 (updated September 2, 2026)

Craft CMS has a CSRF issue in the preview token endpoint at /actions/preview/create-token. The endpoint accepts an attacker-supplied previewToken.

Because the action does not require POST and does not enforce a CSRF token, an attacker can force a logged-in victim editor to mint a preview token chosen by the attacker.

That token can then be used by the attacker (without authentication) to access previewed/unpublished content tied to the victim’s authorized preview scope.

References

Code Behaviors & Features

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