CVE-2026-65011 Graylog2 Server Missing Permission Check on Event Definition Duplicate
Authenticated users with low privileges can clone private event definitions, exposing sensitive detection logic and configuration details.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-65011?
CVE-2026-65011 is a medium-severity missing authorization vulnerability in graylog2-server, published on 22 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-862
Which versions are affected by CVE-2026-65011?
How do I fix CVE-2026-65011?
No fix has been published for CVE-2026-65011 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-65011 being exploited?
There is no known exploitation of CVE-2026-65011 in the wild and no public exploit code.
Sources
Also known as GHSA-p2j9-4mg8-mm73.