Description
By exploiting the defVals parameter, attackers could bypass field‑level access checks during record creation in the TYPO3 backend. This gave them the ability to insert arbitrary data into prohibited exclude fields of a database table for which the user already has write permission for a reduced set of fields. This issue affects TYPO3 CMS versions 10.0.0-10.4.54, 11.0.0-11.5.48, 12.0.0-12.4.40, 13.0.0-13.4.22 and 14.0.0-14.0.1.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| TYPO3 | TYPO3 CMS | 10.0.0 – < 10.4.55, 11.0.0 – < 11.5.49, 12.0.0 – < 12.4.41, 13.0.0 – < 13.4.23, 14.0.0 – < 14.0.2 | 10.4.55 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Packagist | typo3/cms-backend | >= 14.0.0, < 14.0.2 | 14.0.2 | GHSA-5j7q-wmh7-cqhg |
| Packagist | typo3/cms-backend | >= 13.0.0, < 13.4.23 | 13.4.23 | GHSA-5j7q-wmh7-cqhg |
| Packagist | typo3/cms-backend | >= 12.0.0, < 12.4.41 | 12.4.41 | GHSA-5j7q-wmh7-cqhg |
| Packagist | typo3/cms-backend | >= 11.0.0, < 11.5.49 | 11.5.49 | GHSA-5j7q-wmh7-cqhg |
| Packagist | typo3/cms-backend | >= 10.0.0, < 10.4.55 | 10.4.55 | GHSA-5j7q-wmh7-cqhg |
Advisories 2
- NCSC-2026-0018 Kwetsbaarheden verholpen in TYPO3 CMS NCSC-NL (Netherlands) · Jan 16, 2026
- WID-SEC-2026-0095 TYPO3 Core: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 13, 2026
References
- https://typo3.org/security/advisory/typo3-core-sa-2026-001 vendor-advisory
- Git commit of main branch patch
- Git commit of 13.4 branch patch
- Git commit of 12.4 branch patch