PT-2026-63436 · Graylog2 · Graylog2-Server

George Chen · CVE-2026-65011 · Published 2026-07-22 · Updated 2026-07-22

NVD

CVSS v3.1

4.3

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

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.

Fix

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

CVE-2026-65011

Affected Products

Graylog2-Server

References · 7

• https://github.com/Graylog2/graylog2-server/commit/46a2eeba4cdbc1408ff4cbf7b466853a8acfb38d · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-65011 · Security Note
• https://github.com/Graylog2/graylog2-server/issues/26590 · Note
• https://github.com/Graylog2/graylog2-server/pull/26719 · Note
• https://github.com/Graylog2/graylog2-server/pull/26706 · Note
• https://github.com/Graylog2/graylog2-server/pull/26718 · Note
• https://vulncheck.com/advisories/graylog2-server-missing-permission-check-on-event-definition-duplicate · Note