CVE-2026-102139GHSA-fp46-xhg8-vpgm
Kiteworks Email Protection Gateway Incorrect Authorization
Kiteworks Email Protection GatewayNetwork & edge
CVSS
6.5MediumExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.39%Chance of exploitation activity in the next 30 days, higher than 32% of CVEs. Scored 23 Oct 2026FIRST EPSS
What fixes it
- 9.5.1Email Protection GatewayCVE List
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
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.
Text from CVE List
Affected versions 2
- Email Protection Gatewayaffected: all versions before 9.5.1CVE List
- Email Protection Gatewayunaffected: 9.5.1CVE List