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

Quick assessment

Affected
Graylog2 graylog2-server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Graylog2 graylog2-server是Graylog2组织的一款日志分析系统软件。 Graylog2 graylog2-server 7.0.10及之前版本和7.1.5及之前版本存在授权问题漏洞，该漏洞源于在POST /events/definitions/{definitionId}/duplicate端点中缺少每个实体的权限检查，可能导致经过身份验证的用户克隆任何事件定义，具有低权限eventdefinitions:create能力的攻击者可以通过重复操作读取检测查询、聚合阈值、分组字段、

CVSS 4.3 · Medium EPSS 0.38% · P29

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 3

VendorProduct Version RangeStatus
Graylog2 graylog2-server ≤ 7.1.5 affected
≤ 7.0.10 affected
46a2eeba4cdbc1408ff4cbf7b466853a8acfb38d unaffected
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I. Basic Information for CVE-2026-65011

Vulnerability Information
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Vulnerability Title
Graylog2 Server Missing Permission Check on Event Definition Duplicate
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Graylog2 graylog2-server 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Graylog2 graylog2-server是Graylog2组织的一款日志分析系统软件。 Graylog2 graylog2-server 7.0.10及之前版本和7.1.5及之前版本存在授权问题漏洞，该漏洞源于在POST /events/definitions/{definitionId}/duplicate端点中缺少每个实体的权限检查，可能导致经过身份验证的用户克隆任何事件定义，具有低权限eventdefinitions:create能力的攻击者可以通过重复操作读取检测查询、聚合阈值、分组字段、
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Graylog2 graylog2-server 0 ~ 7.1.5 -

II. Public POCs for CVE-2026-65011

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III. Intelligence Information for CVE-2026-65011

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Patches & Fixes for CVE-2026-65011 (5)

Vendor Advisories for CVE-2026-65011 (1)

IV. Related Vulnerabilities

Same product: graylog2-server
Same vendor: Graylog2
Same weakness: CWE-862

V. Comments for CVE-2026-65011

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