CVE-2026-64610Critical· 9.8▾ Midnight

Apache Kylin: Redis unsafe Java deserialization

Deserialization of Untrusted Data vulnerability in Apache Kylin. Unsafe Java deserialization could happen from a broken external cache service. This issue affects Apache Kylin: from 4 through 5.0.4. Users are recommended to upgrade…

▾ Midnight zone — Critical, or high with PoC / in-the-wild

Depth score54/ 100 · Moderate

impact 53.9 · likelihood 0.1 · exploitation 0

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Proof of concept

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Published

Oct 16, 2026

Updated

Oct 20, 2026

CVSS

9.8

Vendor

Apache Software Foundation

Product

Apache Kylin

CWE

CWE-502

Depth score

54 · Moderate

EPSS

0.41% · p36

Platforms

—

Source

CVEORG

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

decided 2026-10-20

Exploitation: none
Automatable: yes
Technical impact: total

Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the CISA ADP record, not NVD.

EPSS history

Exploit-prediction probability, daily snapshots since Oct 17.

0.4% → 0.4%▲ 0.06%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

6 events · 6 days

Oct 16, 2026Published
Disclosed via CVEORG
Oct 17, 2026EPSS first tracked
0.4%
Oct 20, 2026Record revised
Last analysed / modified upstream
Oct 20, 2026CVSS changed
— → 9.8
Oct 20, 2026Severity changed
none → critical
Oct 22, 2026EPSS peak
0.4% → 0.6%

Apache Software Foundation CWE-502 #cve.org

Affected

apache_kylin >= 4..0.0 <= 5.0.4

Full technical detail▾

Overview

Deserialization of Untrusted Data vulnerability in Apache Kylin. Unsafe Java deserialization could happen from a broken external cache service.

This issue affects Apache Kylin: from 4 through 5.0.4.

Users are recommended to upgrade to version 5.0.5, which fixes the issue.

Affected

apache_kylin >= 4..0.0 <= 5.0.4

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

https://lists.apache.org/thread.html/5jwj20t50wc6x9pw0zmlj8tzfl37dpry

Change history

Field changes observed since this record was first indexed.

Oct 20, 2026CVSS — → 9.8
Oct 20, 2026Severity none → critical

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#cve.org

Apache Kylin: Redis unsafe Java deserialization

▾ Midnight zone — Critical, or high with PoC / in-the-wild

Depth score54/ 100 · Moderate

impact 53.9 · likelihood 0.1 · exploitation 0