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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/kiteworks/security-advisories/security/advisories/GHSA-fp46-xhg8-vpgm	Vendor Advisory
https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/VA/white/2026/va-26-274-01.json	Broken Link

Configurations

Configuration 1 (hide)

cpe:2.3:a:accellion:kiteworks:*:*:*:*:*:*:*:*

History

07 Oct 2026, 15:01

Type	Values Removed	Values Added
CPE		cpe:2.3:a:accellion:kiteworks::::::::
First Time		Accellion Accellion kiteworks
References	~~() https://github.com/kiteworks/security-advisories/security/advisories/GHSA-fp46-xhg8-vpgm -~~	() https://github.com/kiteworks/security-advisories/security/advisories/GHSA-fp46-xhg8-vpgm - Vendor Advisory
References	~~() https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/VA/white/2026/va-26-274-01.json -~~	() https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/VA/white/2026/va-26-274-01.json - Broken Link

30 Sep 2026, 21:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-30 21:17

Updated : 2026-10-07 15:01

NVD link : CVE-2026-102139

Mitre link : CVE-2026-102139

CVE.ORG link : CVE-2026-102139

JSON object : View

Products Affected

accellion

kiteworks

CWE

CWE-639

Authorization Bypass Through User-Controlled Key

CWE-863

Incorrect Authorization

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