---
id: CVE-2026-42398
title: >-
  Server-Side Request Forgery (CWE-918) in Kibana allows authenticated users
  with connector management privileges to bypass the operator-configured
  connection allowlist
summary: >-
  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…
severity: high
cvss: 7.7
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N'
cwe:
  - CWE-918
vendor: elastic
product: kibana
affected:
  - 'kibana >= 9.0.0, < 9.2.8'
  - 'kibana >= 9.3.0, < 9.3.2'
patched:
  - kibana 9.3.2
published: '2026-05-28'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T20:10:00.190'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-42398'
references:
  - url: >-
      https://discuss.elastic.co/t/kibana-9-2-8-and-9-3-2-security-update-esa-2026-37/386557
    label: security@elastic.co
tags:
  - nvd
epss: 0.00412
epssPercentile: 0.33771
ingestedAt: '2026-10-14T20:53:12.344Z'
---

## Overview

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.

## Affected

- `kibana >= 9.0.0, < 9.2.8`
- `kibana >= 9.3.0, < 9.3.2`

## Remediation

Upgrade past the affected range:

- `kibana 9.3.2`