{"id":"CVE-2026-15305","state":"PUBLISHED","title":"TYPO3 CMS - Unrestricted File Upload in Form Framework","description":"Users were able to upload files with arbitrary MIME types to forms using FileUpload or ImageUpload elements with allowedMimeTypes configured. The restriction was not enforced server-side because the MimeTypeValidator was registered during form building before concrete form definition properties were applied, resulting in the validator never being added to the processing pipeline. 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