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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apache | Kafka | >= 4.0.0, <= 4.3.0 |
Related Weaknesses (CWE)
References
- https://kafka.apache.org/cve-listVendor Advisory
- http://www.openwall.com/lists/oss-security/2026/06/02/5Mailing ListThird Party Advisory
FAQ
What is CVE-2026-41115?
CVE-2026-41115 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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 ...
How severe is CVE-2026-41115?
CVE-2026-41115 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-41115?
Check the references section above for vendor advisories and patch information. Affected products include: Apache Kafka.