CVE-2026-23921 HIGH

CVE-2026-23921: Blind, read-only SQL injection in Zabbix API via sortfield parameter

Vendor Zabbix
Product Zabbix
Weakness CWE-89 · SQLi
Published March 24, 2026
Last update March 26, 2026

CVSS base score

8.7/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 24, 2026 CVE published
March 26, 2026 Record updated