Description
An authorization check in the large file exchange feature of Kiteworks Email Protection Gateway did not correctly establish that the requesting user was a party to the package being requested. An authenticated user of that optional feature could read the subject, message body, and attachments of packages they neither sent nor received.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Kiteworks | Email Protection Gateway | < 9.5.1 | 9.5.1 |
Advisories 3
- NCSC-2026-0408 Kwetsbaarheden verholpen in Kiteworks NCSC-NL (Netherlands) · Oct 8, 2026
- WID-SEC-2026-3695 Kiteworks: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 30, 2026
- VA-26-274-01 Kiteworks multiple vulnerabilities CISA ICS & IT advisories · Sep 30, 2026