PatchTheCVECVE-2026-102139: An authorization check in the large file exchange feature of Kiteworks Email Protection Gateway did not correc
CVE-2026-102139 is a medium-severity flaw (CVSS 6.5) affecting kiteworks. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Last updated 2026-10-07 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-102139?
kiteworks: upgrade to 9.5.1. Exact commands for each OS are on this page.
Is CVE-2026-102139 being exploited?
CVE-2026-102139 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-102139 affect?
CVE-2026-102139 affects kiteworks. Severity is medium (CVSS 6.5). 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
How urgent is CVE-2026-102139?
Priority 31/100. No elevated risk signals yet.
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