CVE-2026-63259: Authorization Bypass Through User-Controlled Key in Kibana Leading to Information Disclosure

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-21 · updated 2026-10-24
Weakness: CWE-639

Description

Authorization Bypass Through User-Controlled Key (CWE-639) in Kibana can lead to information disclosure via user-supplied identifiers that reference scheduled query result data from Kibana Spaces the requester is not authorized to access.

Affected products

Kibana: from 9.4.0 before 9.4.4 — fixed in 9.4.4

How to fix

Upgrade to a fixed version: Kibana 9.4.4. Check the vendor advisory for mitigations.

References

https://discuss.elastic.co/t/kibana-9-4-4-security-update-esa-2026-70/388573

Get alerted when CVE-2026-63259 or the next vulnerability affects your stack