CVE-2026-26934

Improper Validation of Specified Quantity in Input (CWE-1284) in Kibana can allow an authenticated attacker with view-only privileges to cause a Denial of Service via Input Data Manipulation (CAPEC-153). An attacker can send a specially crafted, malformed payload causing excessive resource consumption and resulting in Kibana becoming unresponsive or crashing.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://discuss.elastic.co/t/kibana-8-19-12-9-2-6-9-3-1-security-update-esa-2026-12/385248	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:elastic:kibana::::::::
	cpe:2.3:a:elastic:kibana::::::::
	cpe:2.3:a:elastic:kibana:9.3.0:::::::*

History

No history.

Information

Published : 2026-02-26 18:23

Updated : 2026-03-02 15:59

NVD link : CVE-2026-26934

Mitre link : CVE-2026-26934

CVE.ORG link : CVE-2026-26934

JSON object : View

Products Affected

elastic

kibana

CWE

CWE-1284

Improper Validation of Specified Quantity in Input

{"id": "CVE-2026-26934", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security@elastic.co", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.8}]}, "published": "2026-02-26T18:23:07.647", "references": [{"url": "https://discuss.elastic.co/t/kibana-8-19-12-9-2-6-9-3-1-security-update-esa-2026-12/385248", "tags": ["Vendor Advisory"], "source": "security@elastic.co"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security@elastic.co", "description": [{"lang": "en", "value": "CWE-1284"}]}], "descriptions": [{"lang": "en", "value": "Improper Validation of Specified Quantity in Input (CWE-1284) in Kibana can allow an authenticated attacker with view-only privileges to cause a Denial of Service via Input Data Manipulation (CAPEC-153). An attacker can send a specially crafted, malformed payload causing excessive resource consumption and resulting in Kibana becoming unresponsive or crashing."}, {"lang": "es", "value": "La Validaci\u00f3n Incorrecta de la Cantidad Especificada en la Entrada (CWE-1284) en Kibana puede permitir a un atacante autenticado con privilegios de solo lectura causar una denegaci\u00f3n de servicio mediante Manipulaci\u00f3n de Datos de Entrada (CAPEC-153). Un atacante puede enviar una carga \u00fatil malformada y especialmente dise\u00f1ada, causando un consumo excesivo de recursos y provocando que Kibana deje de responder o se bloquee."}], "lastModified": "2026-03-02T15:59:55.850", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D88B8A69-2A25-4EB1-AAE4-C18A9F954D03", "versionEndExcluding": "8.19.12", "versionStartIncluding": "8.18.0"}, {"criteria": "cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F14ACA8C-46A2-42EF-9F63-AEF657C6736A", "versionEndExcluding": "9.2.6", "versionStartIncluding": "9.0.0"}, {"criteria": "cpe:2.3:a:elastic:kibana:9.3.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6E90DE12-A5EC-4C3C-A86E-BF5AA0778628"}], "operator": "OR"}]}], "sourceIdentifier": "security@elastic.co"}