https://seclists.org/oss-sec/2026/q4/179: CVE-2026-64959: Apache Kylin: Missing authentication on certain cache API endpoints

Q: Which deployments are most exposed to this issue?

Apache Kylin services directly exposed to the public network are most affected. The advisory states that in-house Kylin deployments are mostly not impacted.

Q: What does an attacker need to exploit the vulnerability?

The affected backend cache API endpoints lack required authentication. An attacker able to reach those endpoints can potentially execute injected SQL.

Q: Which versions should be remediated, and what is the fixed version?

Apache Kylin 5.0.0 through 5.0.4 are affected. Upgrade to Apache Kylin 5.0.5, which fixes the issue.

Published Oct 16, 2026

Updated

Affected Software

1 affected component

Apache Kylin>=5.0.0<=5.0.4

Frequently Asked Questions

Which deployments are most exposed to this issue?

Apache Kylin services directly exposed to the public network are most affected. The advisory states that in-house Kylin deployments are mostly not impacted.

What does an attacker need to exploit the vulnerability?

The affected backend cache API endpoints lack required authentication. An attacker able to reach those endpoints can potentially execute injected SQL.

Which versions should be remediated, and what is the fixed version?

Apache Kylin 5.0.0 through 5.0.4 are affected. Upgrade to Apache Kylin 5.0.5, which fixes the issue.