Kibana Uncontrolled Resource Consumption via Crafty Timelion Expr (CAPEC-130)
CVE-2026-42399 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 low-privileged user can cause Kibana to consume exponentially increasing amounts of memory by submitting a specially crafted Timelion visualization expression containing deeply chained function calls. The resulting data structure grows without bound, exhausting available memory and causing the Kibana service to crash and become unavailable to all users.
Vulnerability Analysis
CVE-2026-42399 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-2026-42399 has been classified to as a Resource Exhaustion vulnerability or weakness.
Products Associated with CVE-2026-42399
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Affected Versions
Elastic Kibana:- Version 8.0.0, <= 8.19.15 is affected.
- Version 9.0.0, <= 9.3.4 is affected.