CVE-2026-102103: Accellion Kiteworks

Critical severity, CVSS 9.1. EPSS: 0.7% chance of exploitation in the next 30 days.

Kiteworks Email Protection Gateway before version 9.5.0 is vulnerable to Server-Side Request Forgery (SSRF). A server-side request forgery (SSRF) weakness in Kiteworks Email Protection Gateway could allow a remote, unauthenticated attacker to induce the gateway to issue crafted requests to internal or otherwise unintended network destinations. The requests are triggered while the gateway retrieves a certificate revocation list in an inbound message. Depending on the services reachable from the gateway, this could disclose sensitive internal information or disrupt gateway operation.

Affected products

• Accellion Kiteworks: before 9.5.0 (fixed in 9.5.0)

Published 2026-09-30. Last modified 2026-10-08.