An authenticated user sending crafted HTTP requests to Zabbix Frontend.
"}],"value":"An authenticated user sending crafted HTTP requests to Zabbix Frontend."}],"credits":[{"lang":"en","type":"reporter","value":"Zabbix wants to thank kang999 for submitting this report on the HackerOne bug bounty platform."}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"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.
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"}],"value":"Update the affected components to their respective fixed versions."}],"source":{"discovery":"EXTERNAL"},"title":"Frontend DoS via the validate.api.exists action","x_generator":{"engine":"Vulnogram 1.0.4"}}},"cveMetadata":{"assignerOrgId":"72de3e22-0555-4a0d-ae81-9249e0f0a1e8","assignerShortName":"Zabbix","cveId":"CVE-2026-23934","datePublished":"2026-08-18T12:18:53.954Z","dateReserved":"2026-01-19T14:03:13.686Z","dateUpdated":"2026-08-18T13:35:07.131Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-18 13:17:21","lastModifiedDate":"2026-09-23 14:30:27","problem_types":["CWE-405","CWE-405 CWE-405: Asymmetric Resource Consumption (Amplification)"],"metrics":{"cvssMetricV40":[{"source":"security@zabbix.com","type":"Secondary","cvssData":{"version":"4.0","vectorString":"CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","baseScore":5.1,"baseSeverity":"MEDIUM","attackVector":"ADJACENT","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}],"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":6.5,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-08-18T12:51:02.788351Z","id":"CVE-2026-23934","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:zabbix:zabbix:*:*:*:*:*:*:*:*","versionStartIncluding":"7.4.0","versionEndExcluding":"7.4.12","matchCriteriaId":"78A9BAC4-F37C-4D86-8887-0E8044E1F1B2"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"23934","Ordinal":"1","Title":"Frontend DoS via the validate.api.exists action","CVE":"CVE-2026-23934","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"23934","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"Frontend DoS via the validate.api.exists action"}]}}}