Vulnerability Details CVE-2026-102139
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 16.0%
CVSS Severity
CVSS v3 Score 6.5
References
Products affected by CVE-2026-102139
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cpe:2.3:a:accellion:kiteworks:7.3.0
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cpe:2.3:a:accellion:kiteworks:7.3.1
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cpe:2.3:a:accellion:kiteworks:7.3.2
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cpe:2.3:a:accellion:kiteworks:7.4.0
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cpe:2.3:a:accellion:kiteworks:9.1.0
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cpe:2.3:a:accellion:kiteworks:9.2.0
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cpe:2.3:a:accellion:kiteworks:9.2.1
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cpe:2.3:a:accellion:kiteworks:9.3.0