Authentication Bypass Vulnerability in Zabbix
CVE-2026-23931

5.3MEDIUM

Key Information:

Vendor

Zabbix

Status
Zabbix
Vendor
CVE Published:
18 August 2026

What is CVE-2026-23931?

An authentication bypass vulnerability exists in Zabbix, specifically through the 'frontend validatate.api.exists' action. This flaw can be exploited by authenticated users, allowing them to extract plaintext user macro values. The exploitation of this vulnerability could potentially lead to unauthorized access to sensitive data and a significant loss of confidentiality for users.

Affected Version(s)

Zabbix 7.4.0 <= 7.4.10

References

https://support.zabbix.com/browse/ZBX-28070

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Zabbix wants to thank nidomer1 for submitting this report on the HackerOne bug bounty platform.
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