CVE-2026-42400

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-42400
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42400.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-42400
Aliases
Downstream
Published
2026-05-28T19:42:11.414Z
Modified
2026-07-22T00:17:32.017119Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
Uncontrolled Resource Consumption in Kibana Leading to Denial of Service
Details

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.

Database specific 
{
    "cna_assigner": "elastic",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42400.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "introduced": "9.4.0"
                },
                {
                    "last_affected": "9.4.1"
                },
                {
                    "introduced": "9.0.0"
                },
                {
                    "last_affected": "9.3.4"
                },
                {
                    "introduced": "8.0.0"
                },
                {
                    "last_affected": "8.19.15"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ],
    "cwe_ids": [
        "CWE-400"
    ]
}
References

Affected packages

Git / github.com/elastic/elasticsearch

Affected ranges

Type
GIT
Repo
https://github.com/elastic/elasticsearch
Events
Introduced
1b6a7ece17463df5ff54a3e1302d825889aa1161
Fixed
0ecfe314ed6ddebb736091bf37b3b6758209b73b
Introduced
112859b85d50de2a7e63f73c8fc70b99eea24291
Fixed
7dcc32bebba091844c0207f9dae8fda6c7d08542
Introduced
2e8528e92361c3399724226deaf2b46f933e925b
Fixed
c402c2b36d90eae29c0182f86bd9050fd0b746cc
Database specific 
{
    "cpe": "cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "8.0.0"
        },
        {
            "fixed": "8.19.16"
        },
        {
            "introduced": "9.0.0"
        },
        {
            "fixed": "9.3.5"
        },
        {
            "introduced": "9.4.0"
        },
        {
            "fixed": "9.4.2"
        }
    ],
    "source": "CPE_RANGE"
}

Affected versions

v9.*
v9.4.0
v9.4.1

Database specific

vanir_signatures_modified 
"2026-07-22T00:17:32Z"
vanir_signatures 
[
    {
        "target": {
            "file": "modules/apm/src/test/java/org/elasticsearch/telemetry/apm/RecordingOtelMeter.java"
        },
        "id": "CVE-2026-42400-a85b3975",
        "digest": {
            "line_hashes": [
                "23074235914325468324376590861514089586",
                "98430579598318027407692933948030043385",
                "187050963769246900287150112416544450660",
                "214623411764654173647043302652335395077",
                "176453353204044914242382593509038157485",
                "213515830173899733296977817562856718047"
            ],
            "threshold": 0.9
        },
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Line",
        "source": "https://github.com/elastic/elasticsearch/commit/0ecfe314ed6ddebb736091bf37b3b6758209b73b"
    },
    {
        "target": {
            "file": "modules/apm/src/test/java/org/elasticsearch/telemetry/apm/RecordingOtelMeter.java"
        },
        "id": "CVE-2026-42400-d726701b",
        "digest": {
            "line_hashes": [
                "23074235914325468324376590861514089586",
                "98430579598318027407692933948030043385",
                "187050963769246900287150112416544450660",
                "214623411764654173647043302652335395077",
                "176453353204044914242382593509038157485",
                "213515830173899733296977817562856718047"
            ],
            "threshold": 0.9
        },
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Line",
        "source": "https://github.com/elastic/elasticsearch/commit/7dcc32bebba091844c0207f9dae8fda6c7d08542"
    },
    {
        "target": {
            "file": "modules/apm/src/test/java/org/elasticsearch/telemetry/apm/RecordingOtelMeter.java"
        },
        "id": "CVE-2026-42400-edd41f68",
        "digest": {
            "line_hashes": [
                "23074235914325468324376590861514089586",
                "98430579598318027407692933948030043385",
                "187050963769246900287150112416544450660",
                "214623411764654173647043302652335395077",
                "176453353204044914242382593509038157485",
                "213515830173899733296977817562856718047"
            ],
            "threshold": 0.9
        },
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Line",
        "source": "https://github.com/elastic/elasticsearch/commit/c402c2b36d90eae29c0182f86bd9050fd0b746cc"
    }
]
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42400.json"

Git / github.com/elastic/kibana

Affected ranges

Type
GIT
Repo
https://github.com/elastic/kibana
Events
Introduced
57ca5e139a33dd2eed927ce98d8231a1f217cd15
Fixed
209c12d77d1bf1bc561abff2b91aa95f354734a3
Introduced
504d6bfa94cca17fabb76e06152c30c4f0c3efdd
Fixed
db396449a69d0613b0b4dc8b8e9789aa35504e0f
Introduced
b2e39752e03b56f48f51943214475ddba1f8e974
Fixed
ca34dedcfe614964fe236c237a023021da0a8665
Database specific 
{
    "cpe": "cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "8.0.0"
        },
        {
            "fixed": "8.19.16"
        },
        {
            "introduced": "9.0.0"
        },
        {
            "fixed": "9.3.5"
        },
        {
            "introduced": "9.4.0"
        },
        {
            "fixed": "9.4.2"
        }
    ],
    "source": "CPE_RANGE"
}

Affected versions

v9.*
v9.4.0
v9.4.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42400.json"