---
id: CVE-2026-4819
title: >-
  In Search Guard FLX versions from 1.0.0 up to 4.0.1, the audit logging feature
  might log user credentials from users logging into Kibana.
summary: >-
  In Search Guard FLX versions from 1.0.0 up to 4.0.1, the audit logging feature
  might log user credentials from users logging into Kibana.
severity: medium
cvss: 4.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-522
  - CWE-532
vendor: search-guard
product: flx
affected:
  - 'flx >= 1.0.0, < 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-2026-4819'
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: 0.00212
epssPercentile: 0.11755
ingestedAt: '2026-07-24T20:38:02.645Z'
---

## Overview

In Search Guard FLX versions from 1.0.0 up to 4.0.1, the audit logging feature might log user credentials from users logging into Kibana.

## Affected

- `flx >= 1.0.0, < 4.1.0`

## Remediation

Upgrade past the affected range:

- `flx 4.1.0`