https://seclists.org/oss-sec/2026/q4/178: CVE-2026-64610: Apache Kylin: dis unsafe Java deserialization

Q: What conditions are required for exploitation?

The unsafe Java deserialization can occur through a broken external cache service. Exploitation therefore depends on Apache Kylin using such an external cache service and that service being compromised or otherwise broken.

Q: Which deployments are affected?

Apache Kylin versions 4.0.0 through 5.0.4 are affected. The provided information does not establish whether all default deployments use an external cache service.

Q: What remediation is available?

Upgrade Apache Kylin to version 5.0.5, which fixes the issue.

Published Oct 16, 2026

Updated

Affected Software

1 affected component

Apache Kylin>=4.0.0<=5.0.4

Frequently Asked Questions

What conditions are required for exploitation?

The unsafe Java deserialization can occur through a broken external cache service. Exploitation therefore depends on Apache Kylin using such an external cache service and that service being compromised or otherwise broken.

Which deployments are affected?

Apache Kylin versions 4.0.0 through 5.0.4 are affected. The provided information does not establish whether all default deployments use an external cache service.

What remediation is available?

Upgrade Apache Kylin to version 5.0.5, which fixes the issue.