CVE-2026-15305 | BDVDB-2026-347604 Detail

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. This issue affects TYPO3 CMS versions 14.2.0-14.3.4.

Impact#

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Exploit#

History#

1. Version 12026-07-14Record published in the CVE List.
2. Version 22026-07-15Most recent update recorded in the CVE List.