CVE-2026-78583 Incorrect Authorization in Kibana Leading to Privilege Escalation

What is CVE-2026-78583?

CVE-2026-78583 is a high-severity vulnerability in Elastic Kibana, published on 3 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official 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.

Weakness: CWE-863

Which versions are affected by CVE-2026-78583?

2 open source packages ship an affected version, including kibana and elk. It affects 1 product.

Products include Elastic Kibana.

How do I fix CVE-2026-78583?

Upgrade kibana to a fixed version for your release line: 8.19.21, 9.4.6 or 9.5.3.

Is CVE-2026-78583 being exploited?

There is no known exploitation of CVE-2026-78583 in the wild and no public exploit code.

Other vulnerabilities in Elastic Kibana

• CVE-2019-7609 Kibana Arbitrary Code Execution Exploited Critical 9.8
• CVE-2025-25015 Kibana arbitrary code execution via prototype pollution Critical 9.9
• CVE-2024-37288 Deserialization in Kibana Critical 9.9
• CVE-2023-31415 Code injection in Kibana Critical 9.9
• CVE-2018-17245 Information disclosure in Kibana Critical 9.8

All Elastic Kibana vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-elk-2026-78583, BIT-kibana-2026-78583, GHSA-3963-6mf6-92mq, MINI-37rp-v5q4-qvh4, MINI-6hhr-px2c-8wj9, MINI-j84m-f27q-j959 and 5 more.