CVE-2026-64959 Apache Software Foundation CVE debrief

Who should care

Defenders responsible for Apache Kylin deployments, especially those exposed to the public network, should assess their exposure and prioritize upgrading to version 5.0.5. This includes reviewing the current deployment status, identifying potential vulnerabilities, and implementing necessary security measures. Defenders should also verify authentication for backend cache API and review compensating controls for exposed systems.

Why it matters

CVE-2026-64959 is a critical SQL injection vulnerability in Apache Kylin that allows code execution via unauthenticated backend cache API, impacting services exposed to the public network. Defenders should prioritize upgrading to version 5.0.5 and assess exposure.

• Potential for code execution via injected SQL
• Lack of authentication for backend cache API
• Exposure of Kylin services to the public network
• Verification of upgrade to version 5.0.5 required

Technical summary

CVE-2026-64959 is a SQL injection vulnerability in Apache Kylin, affecting versions 5 through 5.0.4. The vulnerability is due to missing authentication for critical functions in the backend cache API, allowing execution of injected SQL. The impact is most significant for Kylin services directly exposed to the public network. This vulnerability can lead to code execution via injected SQL. Defenders should prioritize upgrading to version 5.0.5 and assess exposure of Kylin services to the public network. In-house Kylin deployments are mostly not impacted.

Defensive priority

Defenders should prioritize upgrading Apache Kylin to version 5.0.5, assess exposure of Kylin services to the public network, and verify authentication for backend cache API.

Recommended defensive actions

• Upgrade Apache Kylin to version 5.0.5
• Assess exposure of Kylin services to the public network
• Verify authentication for backend cache API
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide details on the SQL injection vulnerability in Apache Kylin, with CVSS score of 9.8 and recommended upgrade to version 5.0.5. The vulnerability affects Apache Kylin versions 5 through 5.0.4. Certain backend cache API misses required authentication and can cause execution of injected SQL. Users are recommended to upgrade to version 5.0.5, which fixes the issue. This information is based on the CVE record and NVD entry.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.