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 ↗

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

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

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