CVE-2026-33459

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Kibana", "vendor": "Elastic", "versions": [{"lessThanOrEqual": "9.3.2", "status": "affected", "version": "9.3.0", "versionType": "semver"}, {"lessThanOrEqual": "8.19.13", "status": "affected", "version": "8.15.0", "versionType": "semver"}, {"lessThanOrEqual": "9.2.7", "status": "affected", "version": "9.0.0", "versionType": "semver"}]}], "source": "security@elastic.co"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*", "matchCriteriaId": "35267655-DDDF-4A74-A438-4CF77E83D509", "versionEndExcluding": "8.19.14", "versionStartIncluding": "8.15.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*", "matchCriteriaId": "301F60F3-1479-432C-875A-76797F9A16D8", "versionEndExcluding": "9.2.8", "versionStartIncluding": "9.0.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*", "matchCriteriaId": "5EE7B9F3-E587-498B-822D-785CB848F767", "versionEndExcluding": "9.3.3", "versionStartIncluding": "9.3.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Uncontrolled Resource Consumption (CWE-400) in Kibana can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated user with access to the automatic import feature can submit specially crafted requests with excessively large input values. When multiple such requests are sent concurrently, the backend services become unstable, resulting in service disruption and deployment unavailability for all users."}, {"lang": "es", "value": "Consumo de Recursos No Controlado (CWE-400) en Kibana puede conducir a denegaci\u00f3n de servicio a trav\u00e9s de Asignaci\u00f3n Excesiva (CAPEC-130). Un usuario autenticado con acceso a la funci\u00f3n de importaci\u00f3n autom\u00e1tica puede enviar solicitudes especialmente dise\u00f1adas con valores de entrada excesivamente grandes. Cuando se env\u00edan m\u00faltiples solicitudes de este tipo concurrentemente, los servicios de backend se vuelven inestables, lo que resulta en interrupci\u00f3n del servicio e indisponibilidad del despliegue para todos los usuarios."}], "id": "CVE-2026-33459", "lastModified": "2026-07-24T23:10:00.563", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "security@elastic.co", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-33459", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-04-09T14:24:36.474697Z", "version": "2.0.3"}}]}, "published": "2026-04-08T18:26:00.407", "references": [{"source": "security@elastic.co", "tags": ["Vendor Advisory"], "url": "https://discuss.elastic.co/t/kibana-8-19-14-9-2-8-9-3-3-security-update-esa-2026-26/385814"}], "sourceIdentifier": "security@elastic.co", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-400"}], "source": "security@elastic.co", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[9.3.0,9.3.2]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[8.15.0,8.19.13]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[9.0.0,9.2.7]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Kibana", "source": "cna", "vendor": "Elastic"}, "product": "kibana", "vendor": "elastic"}], "analysis": {"en": {"generated_at": "2026-04-13T19:25:42.970976+00:00", "value": {"mitigation_remediation": ["Update Kibana to the latest patched release (at least 8.19.14, 9.2.8, or 9.3.3).", "If an immediate upgrade is not feasible, restrict or disable the automatic import feature for users without a legitimate need."], "summary": {"action": "Patch", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "The vulnerability is reported in Elastic Kibana. No specific versions are listed in the official CNA data; however, the security update references Kibana 8.19.14, 9.2.8, and 9.3.3, implying that those releases, and potentially other current versions, are affected until patched. This affects all installations that enable the automatic import feature and have authenticated users capable of invoking it.", "description_and_impact": "Uncontrolled Resource Consumption (CWE-400) in Kibana allows an authenticated user with access to the automatic import feature to submit specially crafted requests containing excessively large input values. When multiple such requests are executed concurrently, the backend services become unstable, causing service disruption and rendering the deployment unavailable for all users. The impact is a denial of service that can affect system availability for all users of the affected Kibana deployment.", "risk_and_exploitability": "The CVSS score of 6.5 indicates moderate severity, and the EPSS score of less than 1% suggests a low probability of exploitation in the wild. The vulnerability is not listed in CISA's Known Exploited Vulnerabilities catalog. Exploitation requires valid credentials with import rights, so an attacker must first authenticate. Once authenticated, the attacker can trigger the denial of service through concurrent large\u2011payload requests. The main risk lies in availability loss for the Kibana service and potential cascading impact on dependent systems."}}}}, "created": "2026-04-08T19:26:45.817015+00:00", "updated": "2026-04-14T16:38:13.750571+00:00", "vendors": ["elastic", "elastic$PRODUCT$kibana"]}