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.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Graylog2
  • Graylog2-server

No data.

No data.

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

Thu, 23 Jul 2026 21:45:00 +0000

Type Values Removed Values Added
First Time appeared Graylog2
Graylog2 graylog2-server
Vendors & Products Graylog2
Graylog2 graylog2-server

Wed, 22 Jul 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 22 Jul 2026 16:30:00 +0000

Type Values Removed Values Added
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.
Title Graylog2 Server Missing Permission Check on Event Definition Duplicate
Weaknesses CWE-862
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'}

cvssV4_0

{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N'}
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-07-22T16:13:35.244Z

Updated: 2026-07-24T21:35:12.085Z

Reserved: 2026-07-21T11:32:54.897Z

Link: CVE-2026-65011

cve-icon Vulnrichment

Updated: 2026-07-22T18:23:09.316Z

cve-icon NVD

No data.

cve-icon Redhat

No data.