What is CVE-2026-78608?

CVE-2026-78608 is a medium-severity vulnerability in Elastic Kibana, classified under Missing Authorization. CVSS score: 6.5/10. Published 2026-09-01.

How severe is CVE-2026-78608?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Elastic Kibana

CVE-2026-78608

Missing Authorization (CWE-862) in Kibana can lead to information disclosure via Privilege Abuse (CAPEC-122). An authorization control was not applied to an internal Kibana APM integration function, allowing any authenticated Kibana user to read APM server credentials that should be restricted to users holding APM or Fleet administrative privileges.

Vulnerability class: Broken Access Control

Published 2026-09-01 · last modified 2026-09-02.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.004 (30.6th percentile), scored 2026-10-17.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 30.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002

Affected products

Elastic Kibana

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

discuss.elastic.co/t/kibana-8-19-21-9-4-6-9-5-2-security-update-esa-2026-144/39… (Vendor Advisory)

Frequently asked questions

What is CVE-2026-78608?: CVE-2026-78608 is a medium-severity vulnerability in Elastic Kibana, classified under Missing Authorization. CVSS score: 6.5/10. Published 2026-09-01.
How severe is CVE-2026-78608?: Medium severity. CVSS v3 base score is 6.5 out of 10.