Is CVE-2026-102406 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-102406 being exploited in the wild.

How severe is CVE-2026-102406?

High severity, with a CVSS score of 8.8, published 6 October 2026.

Which products and versions are affected?

Elastic Kibana 8.14.0 to 8.19.21; 9.0.0 to 9.4.6; 9.5.0 to 9.5.3.

How is CVE-2026-102406 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-102406?

Check whether you run Elastic Kibana at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-102406: Kibana authorization bypass in Fleet package installation

CVE-2026-102406 · Severity: high · CVSS 8.8 · Published 2026-10-06

Kibana is a data visualization and analytics platform used to manage and search logs and metrics. An attacker with Fleet package-management privileges can exploit an ownership verification gap to claim data streams belonging to other users in the same deployment, redirecting their data through attacker-controlled infrastructure. This allows unauthorized access to sensitive data, modification of logs, and denial of service to legitimate data pipelines.

Technologies: Elastic Kibana. Vendors: Elastic.

Quick answers

Is CVE-2026-102406 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-102406 being exploited in the wild.
How severe is CVE-2026-102406?: High severity, with a CVSS score of 8.8, published 6 October 2026.
Which products and versions are affected?: Elastic Kibana 8.14.0 to 8.19.21; 9.0.0 to 9.4.6; 9.5.0 to 9.5.3.
Is there a fix for CVE-2026-102406?: Yes: fixed in Kibana 8.19.22, 9.4.7, 9.5.4. Until then: Until upgrading, remove Fleet custom package-installation privileges from all non-superuser roles, restricting package uploads to full superusers only. Review installation history of uploaded Fleet packages for unexpected datasets and check for unexpected changes to ingest pipelines governing data streams.</anigation> <parameter name="timeline">[ { "kind": "disclosed", "at": "2026-10-06" } ] Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-102406 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-102406?: Check whether you run Elastic Kibana at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: Kibana 8.19.22, 9.4.7, 9.5.4

Until upgrading, remove Fleet custom package-installation privileges from all non-superuser roles, restricting package uploads to full superusers only. Review installation history of uploaded Fleet packages for unexpected datasets and check for unexpected changes to ingest pipelines governing data streams.</anigation> <parameter name="timeline">[ { "kind": "disclosed", "at": "2026-10-06" } ]

Technical details

CWE-639 authorization bypass in Kibana's Fleet package installation process: a user with delegated Fleet privileges but without superuser access can upload a custom integration package that claims an existing data stream identifier without ownership verification. The vulnerable component (Fleet ingest pipeline management) applies the attacker's index and ingest-pipeline configuration to existing infrastructure, redirecting the victim's data through the attacker's control. Attack requires network access and Fleet-level privileges; data interception persists even after package removal and requires separate infrastructure remediation.

Affected products

Elastic Kibana 8.14.0 to 8.19.21; 9.0.0 to 9.4.6; 9.5.0 to 9.5.3

References

https://discuss.elastic.co/t/kibana-8-19-22-9-4-7-9-5-4-security-update-esa-2026-187/390860

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