CVE-2026-63260 Uncontrolled Resource Consumption in Kibana Leading to Denial of Service
An authenticated low-privilege attacker can crash Kibana by sending oversized requests, causing denial of service for all users.
- 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-2026-63260?
CVE-2026-63260 is a medium-severity denial of service vulnerability in Elastic Kibana, published on 21 Jul 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 attacker with low-privilege access can trigger a denial of service condition in Kibana by sending a specially crafted, oversized request payload. Processing this user-supplied input requires resource-intensive memory allocation that can exhaust the available heap memory in the Kibana process, causing it to crash and become unavailable to all users.
Weakness: CWE-400
Which versions are affected by CVE-2026-63260?
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 | 8.19.19, 9.3.8, 9.4.4 |
elk Bitnami | From 8.0.0 | 8.19.19, 9.3.8, 9.4.4 |
Products include Elastic Kibana.
How do I fix CVE-2026-63260?
Upgrade kibana to a fixed version for your release line: 8.19.19, 9.3.8 or 9.4.4.
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-2026-63260 being exploited?
There is no known exploitation of CVE-2026-63260 in the wild and no public exploit code.
Other vulnerabilities in Elastic Kibana
Sources
Also known as BIT-elk-2026-63260, BIT-kibana-2026-63260, GHSA-qcp3-347v-7f6g, MINI-2jhj-hmq4-hc8v, MINI-86j8-j453-fc2p, MINI-97jw-h7h8-37xp and 4 more.