CVE-2026-33459 Uncontrolled Resource Consumption in Kibana Leading to Denial of Service

What is CVE-2026-33459?

CVE-2026-33459 is a medium-severity denial of service vulnerability in Elastic Kibana, published on 8 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

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.

Weakness: CWE-400

Which versions are affected by CVE-2026-33459?

2 open source packages ship an affected version, including kibana and elk. It affects 1 product.

Products include Elastic Kibana.

How do I fix CVE-2026-33459?

Upgrade kibana to a fixed version for your release line: 8.19.14, 9.2.8 or 9.3.3.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2026-33459 being exploited?

There is no known exploitation of CVE-2026-33459 in the wild and no public exploit code.

Other vulnerabilities in Elastic Kibana

• CVE-2019-7609 Kibana Arbitrary Code Execution Exploited Critical 9.8
• CVE-2025-25015 Kibana arbitrary code execution via prototype pollution Critical 9.9
• CVE-2024-37288 Deserialization in Kibana Critical 9.9
• CVE-2023-31415 Code injection in Kibana Critical 9.9
• CVE-2018-17245 Information disclosure in Kibana Critical 9.8

All Elastic Kibana vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-elk-2026-33459, BIT-kibana-2026-33459, GHSA-p635-f626-pv4p, MINI-3cgh-3q2r-x8p3, MINI-5xwg-pgvr-74m2, MINI-mvqf-3wc2-jg7f and 3 more.