{"id":"CVE-2026-23934","title":"An authenticated user is able to cause disproportionate CPU load on the Frontend webserver by sending specifically crafted requests to the Frontend validate.api.exists action, leading to potential denial of service.","summary":"An authenticated user is able to cause disproportionate CPU load on the Frontend webserver by sending specifically crafted requests to the Frontend validate.api.exists action, leading to potential denial of service.","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-405"],"vendor":"zabbix","product":"zabbix","affected":["zabbix >= 7.4.0, < 7.4.12"],"patched":["zabbix 7.4.12"],"published":"2026-08-18","updated":"2026-09-23","sourceUpdated":"2026-09-23T14:30:27.420","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-23934","references":[{"url":"https://support.zabbix.com/browse/ZBX-28072","label":"security@zabbix.com"}],"tags":["nvd"],"epss":0.00169,"epssPercentile":0.06576,"ingestedAt":"2026-09-23T15:26:23.403Z","slug":"CVE-2026-23934","body":"## Overview\n\nAn authenticated user is able to cause disproportionate CPU load on the Frontend webserver by sending specifically crafted requests to the Frontend validate.api.exists action, leading to potential denial of service.\n\n## Affected\n\n- `zabbix >= 7.4.0, < 7.4.12`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `zabbix 7.4.12`","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}