CVE-2026-63260

Analyzed Analyzed - Analysis Complete

Uncontrolled Resource Consumption in Kibana

Publication date: 2026-07-21

Last updated on: 2026-08-03

Assigner: Elastic

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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-07-21

Last Modified

2026-08-03

Generated

2026-08-11

AI Q&A

2026-07-22

EPSS Evaluated

2026-08-09

NVD

CVE-2026-63260

EUVD

EUVD-2026-47588

Affected Vendors & Products

Vendor	Product	Version / Range
elastic	kibana	From 8.0.0 (inc) to 8.19.19 (exc)
elastic	kibana	From 9.0.0 (inc) to 9.3.8 (exc)
elastic	kibana	From 9.4.0 (inc) to 9.4.4 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-400	The product does not properly control the allocation and maintenance of a limited resource.

Attack-Flow Graph

Executive Summary

This is an uncontrolled resource consumption vulnerability in Kibana where an authenticated attacker with low privileges can send a large request payload. The system attempts to allocate excessive memory to process this payload, leading to heap exhaustion and a denial of service.

Detection Guidance

Monitor Kibana process memory usage and logs for crashes or high memory consumption. Check for oversized request payloads in access logs. Use system monitoring tools like top, htop, or ps to observe Kibana process behavior.

Impact Analysis

The vulnerability can cause Kibana to crash and become unavailable, disrupting access for all users. This leads to downtime, loss of service, and potential disruption of monitoring or logging operations that rely on Kibana.

Compliance Impact

This vulnerability primarily impacts availability by causing Kibana to crash, which could lead to service disruptions. For GDPR, availability is a key aspect of data integrity and security, so prolonged outages might raise compliance concerns. HIPAA also emphasizes system availability for protected health information access. However, the vulnerability does not directly affect confidentiality or integrity of data.

Mitigation Strategies

Apply the latest Kibana security patches immediately. Limit user privileges to reduce attack surface. Implement request size limits in your web server or proxy to block oversized payloads. Monitor and restrict memory allocation for Kibana processes.

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