Medium 4.3Published Jul 22, 2026

CVE-2026-65011Graylog2 Server Missing Permission Check on Event Definition Duplicate

Updated under an hour ago (Oct 27, 2026, 1:30 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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: 4.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness (CWE): CWE-862
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Jul 24, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Graylog2 graylog2-server graylog2:server (from the name)	through 7.1.5; through 7.0.10; 46a2eeba4cdbc1408ff4cbf7b466853a8acfb38d not affected	CNA record

References

References

https://github.com/Graylog2/graylog2-server/issues/26590	issue-tracking, technical-description
https://github.com/Graylog2/graylog2-server/pull/26706	issue-tracking, patch
https://github.com/Graylog2/graylog2-server/commit/46a2eeba4cdbc1408ff4cbf7b466853a8acfb38d	patch
https://github.com/Graylog2/graylog2-server/pull/26718	issue-tracking, patch
https://github.com/Graylog2/graylog2-server/pull/26719	issue-tracking, patch
https://www.vulncheck.com/advisories/graylog2-server-missing-permission-check-on-event-definition-duplicate	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.