CVE-2026-26937 Uncontrolled Resource Consumption in Kibana Leading to Denial of Service
Attackers can cause denial of service in Kibana by manipulating input data in the Timelion component, requiring an upgrade to mitigate.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-26937?
CVE-2026-26937 is a medium-severity denial of service vulnerability in Elastic Kibana, published on 26 Feb 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 the Timelion component in Kibana can lead Denial of Service via Input Data Manipulation (CAPEC-153)
Weakness: CWE-400
Which versions are affected by CVE-2026-26937?
2 open source packages ship an affected version, including kibana and elk. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
kibana Bitnami | From 8.0.0 | 8.19.11, 9.2.5 |
elk Bitnami | From 8.0.0 | 8.19.11, 9.2.5 |
Products include Elastic Kibana.
How do I fix CVE-2026-26937?
Upgrade kibana to a fixed version for your release line: 8.19.11 or 9.2.5.
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-2026-26937 being exploited?
There is no known exploitation of CVE-2026-26937 in the wild and no public exploit code.
Other vulnerabilities in Elastic Kibana
Sources
Also known as BIT-elk-2026-26937, BIT-kibana-2026-26937, GHSA-4m27-pqhx-2rfv, MINI-f6m9-25h9-27m2, MINI-hx3v-2xwm-hjp9, MINI-p7m7-66j2-j9ch and 2 more.