Resource exhaustion in Elastic Kibana
CVE-2026-33459
Uncontrolled Resource Consumption (CWE-400) in Kibana can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated user with access to the automatic import feature can submit specially crafted requests with excessively large input values. When multiple such requests are sent concurrently, the backend services become unstable, resulting in service disruption and deployment unavailability for all users.
Vulnerability class: DoS (Denial of Service)
EPSS: 0.002 (15.3th percentile) — read the EPSS interpretation.
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:N/I:N/A:H.
Affected products
- Elastic Kibana — versions 9.3.0, 8.15.0, 9.0.0
Weakness classification (CWE)
References
- security@elastic.co (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-33459?
- CVE-2026-33459 is a medium-severity vulnerability in Elastic Kibana, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2026-04-08.
- How severe is CVE-2026-33459?
- Medium severity. CVSS v3 base score is 6.5 out of 10.