What is CVE-2026-78584?

CVE-2026-78584 is a medium-severity vulnerability in Elastic Kibana, classified under Observable Response Discrepancy. CVSS score: 4.3/10. Published 2026-09-02.

How severe is CVE-2026-78584?

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

Vulnerability in Elastic Kibana

CVE-2026-78584

Observable Response Discrepancy (CWE-204) in the Kibana Osquery feature can lead to information disclosure via Query System for Information (CAPEC-54). An authenticated user holding Osquery live-query privileges could determine whether a scheduled query identifier exists in a Kibana space they are not authorized to access.

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

Weakness classification (CWE)

CWE-204 — Observable Response Discrepancy

References

security@elastic.co

Frequently asked questions

What is CVE-2026-78584?: CVE-2026-78584 is a medium-severity vulnerability in Elastic Kibana, classified under Observable Response Discrepancy. CVSS score: 4.3/10. Published 2026-09-02.
How severe is CVE-2026-78584?: Medium severity. CVSS v3 base score is 4.3 out of 10.