Description
Backend users with file write permissions were able to upload form definition files with mixed-case extensions (e.g., .FORM.YAML) to bypass the Form Framework's upload restriction. Maliciously crafted form definition files can be used to execute arbitrary SQL statements, allowing attackers to escalate privileges by creating administrative backend user accounts. This issue affects TYPO3 CMS versions before 10.4.57, 11.0.0-11.5.50, 12.0.0-12.4.45, 13.0.0-13.4.30 and 14.0.0-14.3.2.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| TYPO3 | TYPO3 CMS | < 10.4.57, 11.0.0 – < 11.5.51, 12.0.0 – < 12.4.46, 13.0.0 – < 13.4.31, 14.0.0 – < 14.3.3 | 10.4.57 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Packagist | typo3/cms-core | < 10.4.57 | 10.4.57 | GHSA-hwvq-2w67-rvxp |
| Packagist | typo3/cms-core | >= 11.0.0, < 11.5.51 | 11.5.51 | GHSA-hwvq-2w67-rvxp |
| Packagist | typo3/cms-core | >= 12.0.0, < 12.4.46 | 12.4.46 | GHSA-hwvq-2w67-rvxp |
| Packagist | typo3/cms-core | >= 13.0.0, < 13.4.31 | 13.4.31 | GHSA-hwvq-2w67-rvxp |
| Packagist | typo3/cms-core | >= 14.0.0, < 14.3.3 | 14.3.3 | GHSA-hwvq-2w67-rvxp |
| Packagist | typo3/cms-form | < 10.4.57 | 10.4.57 | GHSA-hwvq-2w67-rvxp |
| Packagist | typo3/cms-form | >= 11.0.0, < 11.5.51 | 11.5.51 | GHSA-hwvq-2w67-rvxp |
| Packagist | typo3/cms-form | >= 12.0.0, < 12.4.46 | 12.4.46 | GHSA-hwvq-2w67-rvxp |
| Packagist | typo3/cms-form | >= 13.0.0, < 13.4.31 | 13.4.31 | GHSA-hwvq-2w67-rvxp |
| Packagist | typo3/cms-form | >= 14.0.0, < 14.3.3 | 14.3.3 | GHSA-hwvq-2w67-rvxp |
Advisories 1
- WID-SEC-2026-1835 TYPO3 Core: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 9, 2026
References
- https://typo3.org/security/advisory/typo3-core-sa-2026-008 vendor-advisory
- Git commit of main branch patch
- Git commit of 13.4 branch patch