Kibana CVE-2026-49094: Auth Viewer DoS via Oversized Input
CVE-2026-49094 Published on May 28, 2026
Uncontrolled Resource Consumption in Kibana Leading to Denial of Service
Uncontrolled Resource Consumption (CWE-400) in Kibana can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated user with viewer-level access can submit a request containing an oversized input value to an analytics collections management endpoint. Kibana will consume excessive CPU and memory resources while processing the request. This results in Kibana becoming unavailable to all users until the service is manually recovered.
Vulnerability Analysis
CVE-2026-49094 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is a Resource Exhaustion Vulnerability?
The software does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.
CVE-2026-49094 has been classified to as a Resource Exhaustion vulnerability or weakness.
Products Associated with CVE-2026-49094
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Affected Versions
Elastic Kibana:- Version 8.0.0, <= 8.19.15 is affected.