Elastic Kibana up to 8.19.15/9.3.4/9.4.1 resource consumption

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Elastic Kibana up to 8.19.15/9.3.4/9.4.1 and classified as problematic. The affected element is an unknown function. Such manipulation leads to resource consumption. This vulnerability is traded as CVE-2026-42400. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Elastic Kibana up to 8.19.15/9.3.4/9.4.1 and classified as problematic. Affected by this issue is an unknown code. The manipulation with an unknown input leads to a resource consumption vulnerability. Using CWE to declare the problem leads to CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. Impacted is availability. CVE summarizes:

Uncontrolled Resource Consumption (CWE-400) in Kibana can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated user can send a specially crafted compressed request payload that is processed prior to authorization checks, causing excessive memory and CPU resource consumption that can result in a Kibana instance becoming unresponsive or crashing.

The advisory is shared for download at discuss.elastic.co. This vulnerability is handled as CVE-2026-42400 since 04/27/2026. The exploitation is known to be easy. The attack may be launched remotely. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

The vulnerability scanner Nessus provides a plugin with the ID 318724 (Kibana 8.x < 8.19.16 / 9.0.x < 9.3.5 / 9.4.x < 9.4.2 Multiple Vulnerabilities (ESA-2026-35 / ESA-2026-38)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (318724) and CERT Bund (WID-SEC-2026-1734). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Open Source Kibana

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.4

VulDB Base Score: 4.3
VulDB Temp Score: 4.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.5
CNA Vector (elastic): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 318724
Nessus Name: Kibana 8.x < 8.19.16 / 9.0.x < 9.3.5 / 9.4.x < 9.4.2 Multiple Vulnerabilities (ESA-2026-35 / ESA-2026-38)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

04/27/2026 CVE reserved
05/28/2026 +31 days Advisory disclosed
05/28/2026 +0 days VulDB entry created
06/05/2026 +8 days VulDB entry last update

Sourcesinfo

Advisory: discuss.elastic.co
Status: Confirmed

CVE: CVE-2026-42400 (🔒)
GCVE (CVE): GCVE-0-2026-42400
GCVE (VulDB): GCVE-100-366944
CERT Bund: WID-SEC-2026-1734 - Kibana: Mehrere Schwachstellen

Entryinfo

Created: 05/28/2026 23:06
Updated: 06/05/2026 21:23
Changes: 05/28/2026 23:06 (61), 05/29/2026 18:20 (7), 06/05/2026 21:23 (2)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Discussion

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