Bug 2450878 (CVE-2026-23921)

Summary: CVE-2026-23921 Zabbix: Zabbix: Arbitrary database data exfiltration and administrator account compromise via blind SQL injection in API
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Zabbix. A low privilege Zabbix user with API access can exploit a blind SQL injection vulnerability in the API service. This vulnerability allows an attacker to execute arbitrary SQL selects and exfiltrate sensitive database data through time-based techniques. This could potentially lead to the disclosure of session identifiers and compromise of administrator accounts.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On: 2450930, 2450931, 2450933, 2450935    
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Description OSIDB Bzimport 2026-03-24 19:03:22 UTC
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.