---
title: "CVE-2026-102406: Kibana - Authorization Bypass"
description: "Kibana contains an authorization bypass through user-controlled key caused by improper verification of data stream ownership in Fleet package installation, letting attackers with delegated Fleet package-management privileges intercept and modify cross-tenant data streams, exploit requires delegated Fleet package-management privileges without Elasticsearch admin rights."
url: https://panop.io/threat-heartbeat/CVE-2026-102406/
---

# CVE-2026-102406 Kibana - Authorization Bypass

Kibana contains an authorization bypass through user-controlled key caused by improper verification of data stream ownership in Fleet package installation, letting attackers with delegated Fleet package-management privileges intercept and modify cross-tenant data streams, exploit requires delegated Fleet package-management privileges without Elasticsearch admin rights.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.34% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-102406)

## Details

Type

Authorization Bypass

Impact

Information Disclosure, Data Tampering

CVSS vector

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

Published

6 October 2026

Updated

15 October 2026

Weakness

[CWE-639](https://cwe.mitre.org/data/definitions/639.html)

## Vendor fix

Update to the latest Kibana version with the fix for Fleet package installation authorization checks.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-102406](https://nvd.nist.gov/vuln/detail/CVE-2026-102406)
- [https://discuss.elastic.co/t/kibana-8-19-22-9-4-7-9-5-4-security-update-esa-2026-187/390860](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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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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