CVE-2026-1199

API and Frontend login lockout race condition

State: Published
Severity: 6.9 Medium
Published: Aug 18, 2026
Updated: Aug 18, 2026
Reserved: Jan 19, 2026

Description

Zabbix API and Frontend login lockout mechanism has a flaw where several unsuccessful login requests are not properly counted towards the block counter if sent simultaneously, potentially allowing for more password guesses than intended.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N	Zabbix

Weaknesses

CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Affected Products

Product	Versions
ZabbixZabbix	6.0.0 through 6.0.46Affectedfrom 6.0.47Not affected 7.0.0 through 7.0.27Affectedfrom 7.0.28Not affected 7.4.0 through 7.4.11Affectedfrom 7.4.12Not affected

References

https://support.zabbix.com/browse/ZBX-28076

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