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CVE-2026-41115— Apache Kafka: Improper Authorization in CONSUMER_GROUP_DESCRIBE API

Quick assessment

Affected
Apache Software Foundation Apache Kafka
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.

Apache Kafka是美国阿帕奇（Apache）基金会的一套开源的分布式流媒体平台。该平台能够获取实时数据，用于构建对数据流的变化进行实时反应的应用程序。 Apache Kafka存在安全漏洞，该漏洞源于CONSUMER_GROUP_DESCRIBE API验证了GROUP资源上的DESCRIBE操作而非文档中的READ操作，可能导致访问控制列表配置错误和意外安全态势。

AI Predicted 5.3 Difficulty: Theoretical EPSS 0.29% · P21

Affected Version Matrix 1

VendorProduct Version RangeStatus
Apache Software Foundation Apache Kafka 4.0.0≤ 4.3.0 affected
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I. Basic Information for CVE-2026-41115

Vulnerability Information
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Vulnerability Title
Apache Kafka: Improper Authorization in CONSUMER_GROUP_DESCRIBE API
Source: CVE Program / CVE List V5
Vulnerability Description
An improper authorization vulnerability has been identified in Apache Kafka. The implementation of the CONSUMER_GROUP_DESCRIBE (69) API validates the DESCRIBE operation on the GROUP resource instead of the READ operation that documented in the official kafka documentation and the KIP-848. This discrepancy can result in misconfigured Access Control Lists (ACLs) and unintended security postures, like granting READ permission to users who should not be able to join/sync groups, or allowing users without READ permission (but with DESCRIBE permission) to access sensitive group metadata. The correct permission for CONSUMER_GROUP_DESCRIBE API is DESCRIBE GROUP so the current implementation is correct. However, the kafka documentation as well as the KIP-848 will be updated to reflect the correct permission. We advise the Kafka users to review existing group ACLs to ensure the principle of least privilege.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Kafka 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Kafka是美国阿帕奇（Apache）基金会的一套开源的分布式流媒体平台。该平台能够获取实时数据，用于构建对数据流的变化进行实时反应的应用程序。 Apache Kafka存在安全漏洞，该漏洞源于CONSUMER_GROUP_DESCRIBE API验证了GROUP资源上的DESCRIBE操作而非文档中的READ操作，可能导致访问控制列表配置错误和意外安全态势。
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
Apache Software Foundation Apache Kafka 4.0.0 ~ 4.3.0 -

II. Public POCs for CVE-2026-41115

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III. Intelligence Information for CVE-2026-41115

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IV. Related Vulnerabilities

Same product: Apache Kafka
Same vendor: Apache Software Foundation
Same weakness: CWE-285

V. Comments for CVE-2026-41115

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