Name: CVE-2026-42398: Server-Side Request Forgery (SSRF)
Creator: Rapid7
Published: 2026-05-28T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-42398, CWE-918, CVSS 7.7, EPSS 0.00412

Server-Side Request Forgery (CWE-918) in Kibana allows authenticated users with connector management privileges to bypass the operator-configured connection allowlist. By configuring a Webhook connector with a crafted target, an attacker can cause Kibana to issue outbound requests to destinations that the egress restriction controls were intended to block.

CVSS Details

CVSS 3.1 Base Score: 7.7
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Elastic Kibana	—	Upgrade Elastic Kibana to the latest version	May 29, 2026	May 28, 2026

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CVSS Details

Covered by Rapid7

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