Is CVE-2026-63260 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-63260?

CVE-2026-63260 has a CVSS v3 severity of MEDIUM (6.5).

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CVE-2026-63260

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.