CVE-2026-1199 Zabbix CVE debrief

Who should care

Administrators and security teams using Zabbix API and Frontend; review and implement login lockout mechanism securely. They should verify the login lockout mechanism implementation, limit login attempts, and monitor for suspicious login activity. Additionally, security teams should review compensating controls for exposed systems while remediation is scheduled and verified. Asset inventory and vulnerability management teams should also review the affected product scope and assign an owner for follow-up. Security teams should check relevant monitoring, detection, and logs for exposed assets that need extra review. This vulnerability has a medium CVSS score of 6.9 and is classified as MEDIUM severity. The CVE record was published on 2026-08-18T13:17:20.900Z and has not been modified since then. The Zabbix API and Frontend login lockout mechanism has a flaw where several unsuccessful login requests sent simultaneously are not properly counted towards the block counter, potentially allowing for more password guesses than intended. Administrators and security teams should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. They should plan vendor-supported updates or mitigations through normal change control where exposure is confirmed. Security teams should also review compensating controls for exposed systems while remediation is scheduled and verified. They should check relevant monitoring, detection, and logs for exposed assets that need extra review. The official CVE Program record and NIST NVD detail page provide additional information on the vulnerability. The CVE record was published on 2026-08-18T13:17:20.900Z and has not been modified since then. The Zabbix API and Frontend login lockout mechanism has a flaw where several unsuccessful login requests sent simultaneously are not properly counted towards the block counter, potentially allowing for more password guesses than intended. Administrators and security teams should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. They should plan vendor-supported updates or mitigations through norm

Technical summary

The Zabbix API and Frontend login lockout mechanism has a flaw where several unsuccessful login requests sent simultaneously are not properly counted towards the block counter, potentially allowing for more password guesses than intended. This issue affects the login lockout mechanism, allowing for potential brute-force attacks. Defenders should verify the implementation of the login lockout mechanism and limit login attempts to prevent such attacks.

Defensive priority

Medium-priority vulnerability in Zabbix API and Frontend login lockout mechanism; verify and limit login attempts.

Recommended defensive actions

• Verify login lockout mechanism implementation
• Limit login attempts to prevent brute-force attacks
• Monitor for suspicious login activity

Evidence notes

Evidence from official CVE Program record and NIST NVD detail page; verify login lockout mechanism implementation. Additional evidence and verification tasks are needed to ensure the vulnerability is properly addressed. The Zabbix API and Frontend login lockout mechanism flaw allows for more password guesses than intended due to simultaneous login requests not being properly counted. Defenders should verify the implementation of the login lockout mechanism and limit login attempts to prevent brute-force attacks.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.