GHSA-hwvq-2w67-rvxp TYPO3 CMS has Broken Access Control in its Form Framework

• Packagist typo3/cms-core: < 10.4.57 → fixed in 10.4.57 • Packagist typo3/cms-core: >= 11.0.0, < 11.5.51 → fixed in 11.5.51 • Packagist typo3/cms-core: >= 12.0.0, < 12.4.46 → fixed in 12.4.46 • Packagist typo3/cms-core: >= 13.0.0, < 13.4.31 → fixed in 13.4.31 • Packagist typo3/cms-core: >= 14.0.0, < 14.3.3 → fixed in 14.3.3 • Packagist typo3/cms-form: < 10.4.57 → fixed in 10.4.57 • Packagist typo3/cms-form: >= 11.0.0, < 11.5.51 → fixed in 11.5.51 • Packagist typo3/cms-form: >= 12.0.0, < 12.4.46 → fixed in 12.4.46 • Packagist typo3/cms-form: >= 13.0.0, < 13.4.31 → fixed in 13.4.31 • Packagist typo3/cms-form: >= 14.0.0, < 14.3.3 → fixed in 14.3.3

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