CVE-2026-72667
MediumCVSS 6.5Exploitation Probability (EPSS)
Low risk21th percentile - higher than 21% of all known CVEs
Summary
Kibana has a resource allocation vulnerability (CWE-770) leading to denial of service via excessive allocation. A specially crafted request from an authenticated user with minimal privileges to a validation capability in the Observability log analysis feature causes unbounded concurrent work. This can exhaust memory and make Kibana unavailable until restart.
Risk Assessment
The attack can cause full unavailability of Kibana, and even a single request can degrade performance. Repeating requests is cheap, facilitating the attack.
Recommendation
Install the Kibana update with the fix. Restrict access to the log analysis feature and monitor memory usage.
Original NVD description (English source)
Allocation of Resources Without Limits or Throttling (CWE-770) in Kibana can lead to a denial of service via Excessive Allocation (CAPEC-130). A specially crafted request submitted by an authenticated user with minimal privileges to a validation capability of the Observability log analysis feature causes Kibana to perform an unbounded amount of concurrent work. This can exhaust the memory available to the Kibana process and make Kibana unavailable to all users until it is restarted. The severity of the outcome depends on the resources allocated to the deployment; on well-provisioned deployments a single request may cause degraded performance and elevated memory pressure rather than a full outage, but the request is inexpensive to repeat.