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

Severity: medium (CVSS 4.3 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: 2026-03-10 · updated 2026-09-02
Weakness: CWE-352

Description

Craft is a content management system (CMS). Prior to 4.17.3 and 5.9.7, 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 That token can then be used by the attacker (without authentication) to access previewed/unpublished content tied to the victim’s authorized preview scope. This vulnerability is fixed in 4.17.3 and 5.9.7.

Affected products

craftcms cms: from 4.0.0 before 4.17.4; from 5.0.0 before 5.9.7 — fixed in 4.17.4, 5.9.7

How to fix

Upgrade to a fixed version: craftcms cms 4.17.4, 5.9.7. Check the vendor advisory for mitigations.

References

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