CVE-2026-72663 Inefficient Algorithmic Complexity in Kibana Leading to Denial of Service
Attackers can cause denial of service in Kibana by submitting deeply nested expressions to TSVB visualizations, blocking request processing threads.
- 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-2026-72663?
CVE-2026-72663 is a medium-severity denial of service vulnerability in Elastic Kibana, published on 13 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Inefficient Algorithmic Complexity (CWE-407) in Kibana can lead to denial of service via Input Data Manipulation (CAPEC-153). A specially crafted, deeply nested expression submitted to a Kibana TSVB visualization is evaluated with a worst-case cost that grows disproportionately with the size of the input. Because the evaluation runs synchronously, a single request consumes the Kibana request-processing thread indefinitely, and Kibana stops responding to all further requests until the service is restarted.
Weakness: CWE-407
Which versions are affected by CVE-2026-72663?
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 | 8.19.20, 9.4.5 |
elk Bitnami | From 8.0.0 | 8.19.20, 9.4.5 |
Products include Elastic Kibana.
How do I fix CVE-2026-72663?
Upgrade kibana to a fixed version for your release line: 8.19.20 or 9.4.5.
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-2026-72663 being exploited?
There is no known exploitation of CVE-2026-72663 in the wild and no public exploit code.
Other vulnerabilities in Elastic Kibana
Sources
Also known as BIT-elk-2026-72663, BIT-kibana-2026-72663, GHSA-pw35-6253-9877, MINI-24pc-7g83-5x82, MINI-676c-p9q5-34hh, MINI-94vc-3g62-rcxg and 4 more.