CVE-2026-26940

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Source
https://cve.org/CVERecord?id=CVE-2026-26940
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-26940.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-26940
Downstream
MINI (6)
Published
2026-03-19T17:14:31Z
Modified
2026-08-12T15:32:05Z
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
Improper Validation of Specified Quantity in Input in Kibana Leading to Denial of Service
Details

Improper Validation of Specified Quantity in Input (CWE-1284) in the Timelion visualization plugin in Kibana can lead Denial of Service via Excessive Allocation (CAPEC-130). The vulnerability allows an authenticated user to send a specially crafted Timelion expression that overwrites internal series data properties with an excessively large quantity value.

Database specific 
{
    "cna_assigner":  "elastic",
    "cwe_ids":  [
        "CWE-1284"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26940.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "introduced":  "9.3.0"
                },
                {
                    "last_affected":  "9.3.1"
                },
                {
                    "introduced":  "9.0.0"
                },
                {
                    "last_affected":  "9.2.6"
                },
                {
                    "introduced":  "8.0.0"
                },
                {
                    "last_affected":  "8.19.12"
                }
            ],
            "source":  "AFFECTED_FIELD"
        }
    ]
}
References

Affected packages

Git / github.com/elastic/elasticsearch

Affected ranges

Type
GIT
Repo
https://github.com/elastic/elasticsearch
Events
Introduced
1b6a7ece17463df5ff54a3e1302d825889aa1161
Fixed
f6279a2167a248af2bb287409231fb0cf52aa0db
Introduced
112859b85d50de2a7e63f73c8fc70b99eea24291
Fixed
39e49969374b9cb20b84dc00f7d505d67480deeb
Introduced
17b451d8979a29e31935fe1eb901310350b30e62
Fixed
43a703737aab6baefa748bc7b69e4054926f2b2c
Database specific
Show details 
{
    "cpe":  "cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*",
    "extracted_events":  [
        {
            "introduced":  "8.0.0"
        },
        {
            "fixed":  "8.19.13"
        },
        {
            "introduced":  "9.0.0"
        },
        {
            "fixed":  "9.2.7"
        },
        {
            "introduced":  "9.3.0"
        },
        {
            "fixed":  "9.3.2"
        }
    ],
    "source":  "CPE_RANGE"
}

Affected versions

v9.*
v9.3.0
v9.3.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-26940.json"
vanir_signatures 
[
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "47078404655310713527206886804508652819",
                "9736821135205453259684021960045915104",
                "321479224129948038347422783508630426551",
                "336929828005760250217549392973710757538",
                "87981632530719927991976872050798427068",
                "241140473887075321789748749310666516124",
                "296709739770584752465477459733490979822"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-26940-2e203cf7",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/elastic/elasticsearch/commit/39e49969374b9cb20b84dc00f7d505d67480deeb",
        "target":  {
            "file":  "server/src/test/java/org/elasticsearch/index/query/PrefixQueryBuilderTests.java"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "47078404655310713527206886804508652819",
                "9736821135205453259684021960045915104",
                "321479224129948038347422783508630426551",
                "336929828005760250217549392973710757538",
                "87981632530719927991976872050798427068",
                "241140473887075321789748749310666516124",
                "296709739770584752465477459733490979822"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-26940-6bc40983",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/elastic/elasticsearch/commit/43a703737aab6baefa748bc7b69e4054926f2b2c",
        "target":  {
            "file":  "server/src/test/java/org/elasticsearch/index/query/PrefixQueryBuilderTests.java"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "107649075361093097895479135995297736263",
            "length":  292
        },
        "id":  "CVE-2026-26940-95865c28",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/elastic/elasticsearch/commit/39e49969374b9cb20b84dc00f7d505d67480deeb",
        "target":  {
            "file":  "server/src/test/java/org/elasticsearch/index/query/PrefixQueryBuilderTests.java",
            "function":  "testPrefixCircuitBreakerTripsWithLowLimit"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "107649075361093097895479135995297736263",
            "length":  292
        },
        "id":  "CVE-2026-26940-e8da0d97",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/elastic/elasticsearch/commit/43a703737aab6baefa748bc7b69e4054926f2b2c",
        "target":  {
            "file":  "server/src/test/java/org/elasticsearch/index/query/PrefixQueryBuilderTests.java",
            "function":  "testPrefixCircuitBreakerTripsWithLowLimit"
        }
    }
]
vanir_signatures_modified 
"2026-08-12T15:32:05Z"

Git / github.com/elastic/kibana

Affected ranges

Type
GIT
Repo
https://github.com/elastic/kibana
Events
Introduced
57ca5e139a33dd2eed927ce98d8231a1f217cd15
Fixed
2cc8a9176084bc48abad7a65cc3a3f5961c8d9cb
Introduced
504d6bfa94cca17fabb76e06152c30c4f0c3efdd
Fixed
6bff11df59c8077810f373e3f4e2f2499ec906a9
Introduced
30ab63cc0017fe2da7a84fb9b285dd762468802d
Fixed
80a75d1ae44e8a67f79adf9709bba3075d85afc7
Database specific
Show details 
{
    "cpe":  "cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*",
    "extracted_events":  [
        {
            "introduced":  "8.0.0"
        },
        {
            "fixed":  "8.19.13"
        },
        {
            "introduced":  "9.0.0"
        },
        {
            "fixed":  "9.2.7"
        },
        {
            "introduced":  "9.3.0"
        },
        {
            "fixed":  "9.3.2"
        }
    ],
    "source":  "CPE_RANGE"
}

Affected versions

v9.*
v9.3.0
v9.3.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-26940.json"