---
id: CVE-2026-4818
title: >-
  In Search Guard FLX versions from 3.0.0 up to 4.0.1, there exists an issue
  which allows users without the necessary privileges to execute some management
  operations against data streams.
summary: >-
  In Search Guard FLX versions from 3.0.0 up to 4.0.1, there exists an issue
  which allows users without the necessary privileges to execute some management
  operations against data streams.
severity: medium
cvss: 6.8
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-285
  - CWE-862
vendor: search-guard
product: flx
affected:
  - 'flx >= 3.0.0, < 4.1.0'
patched:
  - flx 4.1.0
published: '2026-03-31'
updated: '2026-07-24'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-4818'
references:
  - url: 'https://docs.search-guard.com/latest/changelog-searchguard-flx-4_1_0'
    label: security@search-guard.com
  - url: 'https://search-guard.com/cve-advisory/'
    label: security@search-guard.com
tags:
  - nvd
epss: 0.00329
epssPercentile: 0.23263
ingestedAt: '2026-07-24T20:38:02.619Z'
---

## Overview

In Search Guard FLX versions from 3.0.0 up to 4.0.1, there exists an issue which allows users without the necessary privileges to execute some management operations against data streams.

## Affected

- `flx >= 3.0.0, < 4.1.0`

## Remediation

Upgrade past the affected range:

- `flx 4.1.0`