---
cve: "CVE-2026-65011"
severity: "MEDIUM"
cvss: 5.3
epss: "0.4%"
vendor: "Graylog2"
kev: false
exploited: false
published: "2026-07-22 16:13:35"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-28T09:42:16+02:00"
---

# CVE-2026-65011

> 5.3 MEDIUM · 🧪 PoC

## Beschreibung

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.

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **no**
  - Technical Impact: **partial**

## CVSS-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 46a2eeba4cdbc1408ff4cbf7b466853a8acfb38d (Commit)

## Referenzen

- <https://github.com/Graylog2/graylog2-server/issues/26590>
- <https://github.com/Graylog2/graylog2-server/pull/26706>
- <https://github.com/Graylog2/graylog2-server/commit/46a2eeba4cdbc1408ff4cbf7b466853a8acfb38d>
- <https://github.com/Graylog2/graylog2-server/pull/26718>
- <https://github.com/Graylog2/graylog2-server/pull/26719>
- <https://www.vulncheck.com/advisories/graylog2-server-missing-permission-check-on-event-definition-duplicate>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-65011) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_