CVE-2026-65011
Graylog2 Server Missing Permission Check on Event Definition Duplicate
- State
- Published
- Severity
- 5.3 Medium
- Published
- Jul 22, 2026
- Updated
- Jul 24, 2026
- Reserved
- Jul 21, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.3 Medium | 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 | VulnCheck |
| 3.1 | 4.3 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N | VulnCheck |
Weaknesses
- CWE-862 Missing Authorization
Affected Products
| Product | Versions |
|---|---|
graylog2-serverGraylog2 |
|
References
- Researcher Disclosureissue-trackingtechnical-description
- Pull Requestissue-trackingpatch
- Patch Commitpatch
- 7.0 Backport Fixissue-trackingpatch
- 7.1 Backport Fixissue-trackingpatch
- https://www.vulncheck.com/advisories/graylog2-server-missing-permission-check-on-event-definition-duplicatethird-party-advisory
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