Elasticsearch CVE-2026-63136: Uncontrolled Resource Consumption (CWE-400)
CVE-2026-63136 Published on July 21, 2026
Uncontrolled Resource Consumption in Elasticsearch Leading to Denial of Service
Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130). A user with search privileges can submit a specially crafted search request that causes a data node to exhaust available heap memory, resulting in node unavailability and cluster degradation. An attacker could leverage this vulnerability to cause cluster downtime requiring manual intervention to restore service.
Vulnerability Analysis
CVE-2026-63136 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-2026-63136 has been classified to as a Resource Exhaustion vulnerability or weakness.
Products Associated with CVE-2026-63136
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Affected Versions
Elasticsearch:- Version 8.0.0, <= 8.19.14 is affected.
- Version 9.3.0, <= 9.3.3 is affected.
- Version 9.0.0, <= 9.2.8 is affected.