Auth bypass in Elastic Elasticsearch
CVE-2026-78607
Missing Authorization (CWE-862) in the Elasticsearch custom inference service can lead to information disclosure via Privilege Abuse (CAPEC-122). A user holding only inference execution privileges could cause outbound inference traffic to be directed to a destination of their choosing and could cause administrator-provisioned credentials to be exposed.
Vulnerability class: Broken Access Control
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
Affected products
- Elastic Elasticsearch — versions 9.5.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-78607?
- CVE-2026-78607 is a medium-severity vulnerability in Elastic Elasticsearch, classified under Missing Authorization. CVSS score: 5.4/10. Published 2026-09-01.
- How severe is CVE-2026-78607?
- Medium severity. CVSS v3 base score is 5.4 out of 10.