---
id: CVE-2026-23921
title: >-
  A low privilege Zabbix user with API access can exploit a blind SQL injection
  vulnerability in include/classes/api/CApiService.php to execute arbitrary SQL
  selects via the sortfield parameter
summary: >-
  A low privilege Zabbix user with API access can exploit a blind SQL injection
  vulnerability in include/classes/api/CApiService.php to execute arbitrary SQL
  selects via the sortfield parameter. Although query results are not returned
  dire…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-89
vendor: zabbix
product: zabbix
affected:
  - 'zabbix >= 7.0.0, < 7.0.22'
  - 'zabbix >= 7.2.0, < 7.2.15'
  - 'zabbix >= 7.4.0, < 7.4.6'
patched:
  - zabbix 7.4.6
published: '2026-03-24'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T21:13:20.120'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-23921'
references:
  - url: 'https://support.zabbix.com/browse/ZBX-27640'
    label: security@zabbix.com
tags:
  - nvd
  - exploit-available
epss: 0.03499
epssPercentile: 0.88702
exploits:
  github: 2
  githubRepos:
    - 'https://github.com/RichJJ98/analise-vulnerabilidades-zabbix-notebooklm'
    - 'https://github.com/qucklecrabik/CVE-2026-23921'
  checkedAt: '2026-09-25T08:20:53.241Z'
exploitAvailable: true
ingestedAt: '2026-09-10T22:07:00.625Z'
---

## Overview

A low privilege Zabbix user with API access can exploit a blind SQL injection vulnerability in include/classes/api/CApiService.php to execute arbitrary SQL selects via the sortfield parameter. Although query results are not returned directly, an attacker can exfiltrate arbitrary database data through time-based techniques, potentially leading to session identifier disclosure and administrator account compromise.

## Affected

- `zabbix >= 7.0.0, < 7.0.22`
- `zabbix >= 7.2.0, < 7.2.15`
- `zabbix >= 7.4.0, < 7.4.6`

## Remediation

Upgrade past the affected range:

- `zabbix 7.4.6`