Medium severity · published Sep 30, 2026
CVE-2026-102144
Kiteworks Email Protection Gateway Uncontrolled Resource Consumption
5.3
CVSS
0.4%
EPSS
No
On KEV
Description
A resource exhaustion vulnerability in Kiteworks Email Protection Gateway allowed an unauthenticated remote attacker to repeatedly trigger a comparatively expensive server-side operation, causing a partial denial of service.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 30% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EP
Email Protection Gateway · Kiteworks
before 9.5.1 · source: vendor
KI
Kiteworks · Accellion
before 9.5.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-102144
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-102144
github.com
https://github.com/kiteworks/security-advisories/security/advisories/GHSA-wwhf-5862-rjxq
third-party-advisory
https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/VA/white/2026/va-26-274-01.json
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9.1
CVE-2026-102105
Kiteworks Email Protection Gateway server-side request forgery
9.1
CVE-2026-102106
Kiteworks Email Protection Gateway improper authentication
9.1
CVE-2026-102104
Kiteworks Email Protection Gateway server-side request forgery
9.1
CVE-2026-102103
Kiteworks Email Protection Gateway server-side request forgery