Is CVE-2026-102139 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-102139?

CVE-2026-102139 has a CVSS v3 severity of MEDIUM (6.5).

Back

CVE-2026-102139

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.