CVE-2026-63260 — Uncontrolled Resource Consumption in Kibana Leading to Denial of Service

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Elastic / Kibana	affected 9.0.0 through 9.3.7; affected 8.0.0 through 8.19.18; affected 9.4.0 through 9.4.3

CWE

CWE-400

References

https://discuss.elastic.co/t/kibana-8-19-19-9-3-8-9-4-4-security-update-esa-2026-71/388574

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.