CVE-2026-63260

Uncontrolled Resource Consumption in Kibana Leading to Denial of Service

State: Published
Severity: 6.5 Medium
Published: Jul 21, 2026
Updated: Jul 22, 2026
Reserved: Jul 16, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	elastic

Weaknesses

CWE-400 Uncontrolled Resource Consumption

Affected Products

Product	Versions
KibanaElastic	9.0.0 through 9.3.7Affected 8.0.0 through 8.19.18Affected 9.4.0 through 9.4.3Affected

References

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

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