Critical 9.1Published Sep 30, 2026

CVE-2026-102104Kiteworks Email Protection Gateway server-side request forgery

Updated under an hour ago (2026-10-19 08:23 UTC)

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It affects Kiteworks Email Protection Gateway and 1 other product. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.71%, higher than 52% of scored CVEs.

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Every CVE for Kiteworks Email Protection Gateway

Exploited in the last 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 performs an online certificate status check for an inbound message. Depending on the services reachable from the gateway, this could disclose sensitive internal information or disrupt gateway operation.

CVSS: 9.1 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Weakness (CWE): CWE-918
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.71% (percentile 52)
Assigned by: cisa-cg
NVD analysis: Analyzed
Record last updated: Oct 1, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Kiteworks Email Protection Gateway kiteworks:email_protection_gateway (from the name)	before 9.5.0; 9.5.0 not affected	CNA record
accellion kiteworks accellion:kiteworks	before 9.5.0	NVD

References

https://github.com/kiteworks/security-advisories/security/advisories/GHSA-mqw3-m87w-4fx4vendor-advisory
https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/VA/white/2026/va-26-274-01.jsonthird-party-advisory, broken-link

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.