GHSA-hwvq-2w67-rvxp
TYPO3 CMS has Broken Access Control in its Form Framework
Quick fix
GHSA-hwvq-2w67-rvxp — typo3/cms-core: upgrade to the fixed version with the command below.
composer require typo3/cms-core:^10.4.57Details
### Problem 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.
### Solution Update to TYPO3 versions 10.4.57 ELTS, 11.5.51 ELTS, 12.4.46 ELTS, 13.4.31 LTS, 14.3.3 LTS that fix the problem described.
### Credits TYPO3 CMS thanks Alexander Künzl for reporting this issue, and to TYPO3 core & security team members Oliver Hader and Benjamin Franzke for fixing it.
### Resources * [TYPO3-CORE-SA-2026-008](https://typo3.org/security/advisory/typo3-core-sa-2026-008)
Are you affected?
Enter the version of the package you're using.
Affected packages
0Fixed in: 10.4.57composer require typo3/cms-core:^10.4.5711.0.0Fixed in: 11.5.51composer require typo3/cms-core:^11.5.5112.0.0Fixed in: 12.4.46composer require typo3/cms-core:^12.4.4613.0.0Fixed in: 13.4.31composer require typo3/cms-core:^13.4.3114.0.0Fixed in: 14.3.3composer require typo3/cms-core:^14.3.30Fixed in: 10.4.57composer require typo3/cms-form:^10.4.5711.0.0Fixed in: 11.5.51composer require typo3/cms-form:^11.5.5112.0.0Fixed in: 12.4.46composer require typo3/cms-form:^12.4.4613.0.0Fixed in: 13.4.31composer require typo3/cms-form:^13.4.3114.0.0Fixed in: 14.3.3composer require typo3/cms-form:^14.3.3References
- https://github.com/TYPO3/typo3/security/advisories/GHSA-hwvq-2w67-rvxp[WEB]
- https://nvd.nist.gov/vuln/detail/CVE-2026-47346[ADVISORY]
- https://github.com/TYPO3/typo3/commit/2030617e6f273cee7b756c695f0a48a45a31eb47[WEB]
- https://github.com/TYPO3/typo3/commit/eb2b2251d90339d3ab55df3d4c0378ae0c780b45[WEB]
- https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2026-47346.yaml[WEB]
- https://github.com/TYPO3/typo3[PACKAGE]
- https://typo3.org/security/advisory/typo3-core-sa-2026-008[WEB]