CVE-2026-65011

Description

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.

References

• 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