What is CVE-2026-63259?

CVE-2026-63259 is a medium-severity vulnerability in Elastic Kibana, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-07-21.

How severe is CVE-2026-63259?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Elastic Kibana

CVE-2026-63259

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.

Vulnerability class: IDOR (Insecure Direct Object Reference)

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

Affected products

Elastic Kibana — versions 9.4.0

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

security@elastic.co

Frequently asked questions

What is CVE-2026-63259?: CVE-2026-63259 is a medium-severity vulnerability in Elastic Kibana, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-07-21.
How severe is CVE-2026-63259?: Medium severity. CVSS v3 base score is 4.3 out of 10.