CVE-2026-65011

Graylog2 Server before commit 46a2eeb contains a missing per-entity permission check in the POST /events/definitions/{definitionId}/duplicate endpoint that allows authenticated users to clone any event definition. Attackers with the low-privilege eventdefinitions:create capability can read private event definitions including detection queries, aggregation thresholds, grouping fields, schedules, and notification bindings by duplicating them.

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/Graylog2/graylog2-server/commit/46a2eeba4cdbc1408ff4cbf7b466853a8acfb38d
https://github.com/Graylog2/graylog2-server/issues/26590
https://github.com/Graylog2/graylog2-server/pull/26706
https://github.com/Graylog2/graylog2-server/pull/26718
https://github.com/Graylog2/graylog2-server/pull/26719
https://www.vulncheck.com/advisories/graylog2-server-missing-permission-check-on-event-definition-duplicate

Configurations

No configuration.

History

24 Oct 2026, 13:10

Type	Values Removed	Values Added
Summary		(es) Graylog2 Servidor antes del commit 46a2eeb contiene una comprobación de permisos por entidad faltante en el endpoint POST /events/definitions/{definitionId}/duplicate que permite a usuarios autenticados clonar cualquier definición de evento. Atacantes con la capacidad de bajo privilegio ’eventdefinitions:create’ pueden leer definiciones de eventos privadas, incluyendo consultas de detección, umbrales de agregación, campos de agrupación, programaciones y enlaces de notificación, duplicándolas.

Information

Published : 2026-07-22 17:16

Updated : 2026-10-24 13:10

NVD link : CVE-2026-65011

Mitre link : CVE-2026-65011

CVE.ORG link : CVE-2026-65011

JSON object : View

Products Affected

No product.

CWE

CWE-862

Missing Authorization

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Attackers with the low-privilege eventdefinitions:create capability can read private event definitions including detection queries, aggregation thresholds, grouping fields, schedules, and notification bindings by duplicating them."}, {"lang": "es", "value": "Graylog2 Servidor antes del commit 46a2eeb contiene una comprobaci\u00f3n de permisos por entidad faltante en el endpoint POST /events/definitions/{definitionId}/duplicate que permite a usuarios autenticados clonar cualquier definici\u00f3n de evento. Atacantes con la capacidad de bajo privilegio \u2019eventdefinitions:create\u2019 pueden leer definiciones de eventos privadas, incluyendo consultas de detecci\u00f3n, umbrales de agregaci\u00f3n, campos de agrupaci\u00f3n, programaciones y enlaces de notificaci\u00f3n, duplic\u00e1ndolas."}], "lastModified": "2026-10-24T13:10:00.147", "sourceIdentifier": "disclosure@vulncheck.com"}