What is CVE-2026-78583?

CVE-2026-78583 is a high-severity vulnerability, classified under Incorrect Authorization. CVSS score: 8.1/10. Published 2026-09-03.

How severe is CVE-2026-78583?

High severity. CVSS v3 base score is 8.1 out of 10.

CVE-2026-78583

CVE-2026-78583

Incorrect Authorization (CWE-863) in Kibana can lead to privilege escalation via Input Data Manipulation (CAPEC-153). Elasticsearch cluster privilege declarations originating from integration packages were not validated before being used to mint credentials for enrolled Elastic Agents. A user holding Fleet management privileges could therefore cause every Elastic Agent on a targeted policy to receive a credential carrying arbitrarily elevated Elasticsearch cluster privileges, up to and including full cluster administration.

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

security@elastic.co

Frequently asked questions

What is CVE-2026-78583?: CVE-2026-78583 is a high-severity vulnerability, classified under Incorrect Authorization. CVSS score: 8.1/10. Published 2026-09-03.
How severe is CVE-2026-78583?: High severity. CVSS v3 base score is 8.1 out of 10.