---
id: CVE-2026-23933
title: >-
  In Zabbix 7.4 the cryptographic key used for signing Frontend sessions has
  been erroneously written to the database seed
summary: >-
  In Zabbix 7.4 the cryptographic key used for signing Frontend sessions has
  been erroneously written to the database seed. Currently the only known
  exploitation scenario is for deployments that utilize both - SAML
  authentication and guest…
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-259
vendor: zabbix
product: zabbix
affected:
  - 'zabbix >= 7.4.0, < 7.4.11'
patched:
  - zabbix 7.4.11
published: '2026-08-18'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T14:31:46.943'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-23933'
references:
  - url: 'https://support.zabbix.com/browse/ZBX-28071'
    label: security@zabbix.com
tags:
  - nvd
epss: 0.00199
epssPercentile: 0.10009
ingestedAt: '2026-09-23T15:26:23.402Z'
---

## Overview

In Zabbix 7.4 the cryptographic key used for signing Frontend sessions has been erroneously written to the database seed. Currently the only known exploitation scenario is for deployments that utilize both - SAML authentication and guest users. In such cases the key can be used to forge valid session cookies, potentially leading to unauthorized access. For other Zabbix deployments this does not have a known impact.

## Affected

- `zabbix >= 7.4.0, < 7.4.11`

## Remediation

Upgrade past the affected range:

- `zabbix 7.4.11`