Kibana Canvas Authenticated DoS via Uncontrolled Resource Consumption
CVE-2026-63139 Published on July 21, 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 low-privileged user can exploit an uncontrolled resource consumption vulnerability in Kibana's Canvas functionality by sending a specially crafted request, causing the Kibana server process to terminate and resulting in a denial of service for all users of the affected Kibana instance.
Vulnerability Analysis
CVE-2026-63139 can be exploited 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-2026-63139 has been classified to as a Resource Exhaustion vulnerability or weakness.
Products Associated with CVE-2026-63139
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Affected Versions
Elastic Kibana:- Version 8.0.0, <= 8.19.18 is affected.
- Version 9.4.0, <= 9.4.3 is affected.
- Version 9.3.0, <= 9.3.7 is affected.