CVE-2026-23921

Blind, read-only SQL injection in Zabbix API via sortfield parameter

State: Published
Severity: 8.7 High
Published: Mar 24, 2026
Updated: Mar 26, 2026
Reserved: Jan 19, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	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	Zabbix

Weaknesses

CWE-89 Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

Affected Products

Product	Versions
ZabbixZabbix	7.0.0 through 7.0.21Affectedfrom 7.0.22Not affected 7.2.0 through 7.2.14Affectedfrom 7.2.15Not affected 7.4.0 through 7.4.5Affectedfrom 7.4.6Not affected

References

https://support.zabbix.com/browse/ZBX-27640

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