Vulnerability 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.
Related Weaknesses (CWE)
References
- https://github.com/TYPO3/typo3/commit/2030617e6f273cee7b756c695f0a48a45a31eb47
- https://github.com/TYPO3/typo3/commit/eb2b2251d90339d3ab55df3d4c0378ae0c780b45
- https://typo3.org/security/advisory/typo3-core-sa-2026-008
FAQ
What is CVE-2026-47346?
CVE-2026-47346 is a documented vulnerability. 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...
How severe is CVE-2026-47346?
CVSS scoring is not yet available for CVE-2026-47346. Check NVD for updates.
Is there a patch for CVE-2026-47346?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.