{"id":"CVE-2026-102139","published":"2026-09-30T21:17:02.663","lastModified":"2026-10-01T14:17:18.493","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.","cvssScore":6.5,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","cwes":["CWE-639","CWE-863"],"vendors":[],"products":[],"references":[{"url":"https://github.com/kiteworks/security-advisories/security/advisories/GHSA-fp46-xhg8-vpgm","tags":[]},{"url":"https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/VA/white/2026/va-26-274-01.json","tags":[]}],"exploitRefs":[{"url":"https://github.com/kiteworks/security-advisories/security/advisories/GHSA-fp46-xhg8-vpgm","tags":[]}],"hasPoc":true,"ai":null}