CVE-2026-33459

EUVD-2026-20521
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.5 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 16%
Affected Products (NVD)
VendorProductVersion
elastickibana
8.15.0 ≤
𝑥
< 8.19.14
elastickibana
9.0.0 ≤
𝑥
< 9.2.8
elastickibana
9.3.0 ≤
𝑥
< 9.3.3
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://discuss.elastic.co/t/kibana-8-19-14-9-2-8-9-3-3-security-update-esa-2026-26/385814