{"id":"CVE-2026-102139","aliases":["EUVD-2026-90275"],"status":"published","title":"Kiteworks Email Protection Gateway Incorrect Authorization","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.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00394,"percentile":0.34129,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-639","CWE-863"],"published":"2026-09-30T20:11:17Z","modified":"2026-10-07T15:01:35Z","products":[{"vendor":"accellion","product":"kiteworks"},{"vendor":"kiteworks","product":"email protection gateway"}],"references":[{"url":"https://github.com/kiteworks/security-advisories/security/advisories/GHSA-fp46-xhg8-vpgm","tags":["Vendor Advisory"]},{"url":"https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/VA/white/2026/va-26-274-01.json","tags":["Broken Link"]}],"sources":{"cve":[{"id":"CVE-2026-102139","title":"Kiteworks Email Protection Gateway Incorrect Authorization","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.","status":"published","published":"2026-09-30T20:11:17.678Z","modified":"2026-10-01T13:37:07.509Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-639","CWE-863"],"updated_at":"2026-11-02T13:38:54.394896Z"}],"euvd":[{"id":"EUVD-2026-90275","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.","status":"published","published":"2026-09-30T20:11:17Z","modified":"2026-10-01T13:37:07Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T17:27:46.15359Z"}],"nvd":[{"id":"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.","status":"published","published":"2026-09-30T21:17:02.663Z","modified":"2026-10-07T15:01:35.23Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-639","CWE-863"],"updated_at":"2026-11-02T14:12:53.097633Z"}]}}