Vulnerability 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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/Graylog2/graylog2-server/commit/46a2eeba4cdbc1408ff4cbf7b4668
- 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
FAQ
What is CVE-2026-65011?
CVE-2026-65011 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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 even...
How severe is CVE-2026-65011?
CVE-2026-65011 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-65011?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.