Is CVE-2026-78583 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-78583?

CVE-2026-78583 has a CVSS v3 severity of HIGH (8.1).

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CVE-2026-78583

Description

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.