CVE-2026-0531 Allocation of Resources Without Limits or Throttling in Kibana Fleet

What is CVE-2026-0531?

CVE-2026-0531 is a medium-severity denial of service vulnerability in Elastic Kibana, published on 13 Jan 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Allocation of Resources Without Limits or Throttling (CWE-770) in Kibana Fleet can lead to Excessive Allocation (CAPEC-130) via a specially crafted bulk retrieval request. This requires an attacker to have low-level privileges equivalent to the viewer role, which grants read access to agent policies. The crafted request can cause the application to perform redundant database retrieval operations that immediately consume memory until the server crashes and becomes unavailable to all users.

Weakness: CWE-770

Which versions are affected by CVE-2026-0531?

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-2026-0531?

Upgrade kibana to a fixed version for your release line: 8.19.10, 9.1.10 or 9.2.4.

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-2026-0531 being exploited?

There is no known exploitation of CVE-2026-0531 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-2026-0531, BIT-kibana-2026-0531, GHSA-g37r-x966-x536, MINI-7mpm-m49g-wmj9, MINI-8wqf-xvvc-g644, MINI-9pfr-9852-xfwf and 3 more.