CVE-2026-102140: Kiteworks Core Insufficient Verification of Data Authenticity

Severity: medium (CVSS 4.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-30 · updated 2026-10-13
Weakness: CWE-345

Description

An authenticated administrator could initiate an administrative import using a file whose contents were not fully verified, because the import validated only the file's header rather than the complete file. This could allow unverified or forged content to be accepted and processed, affecting the integrity of the imported data.

Affected products

Kiteworks Email Protection Gateway: before 9.5.1 — fixed in 9.5.1

How to fix

Upgrade to a fixed version: Kiteworks Email Protection Gateway 9.5.1. Check the vendor advisory for mitigations.

References

https://github.com/kiteworks/security-advisories/security/advisories/GHSA-wfxj-p5jc-jqjw
https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/VA/white/2026/va-26-274-01.json

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