GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2026-56149 (GCVE-0-2026-56149)

Vulnerability from cvelistv5 – Published: 2026-07-01 16:21 – Updated: 2026-07-01 17:25
VLAI
Title
Allocation of Resources Without Limits or Throttling in Elasticsearch Leading to Denial of Service
Summary
Allocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can lead to a denial of service via Excessive Allocation (CAPEC-130). A user with elevated privileges can submit a specially crafted machine learning request that causes excessive memory consumption, which may render the affected node unavailable.
Severity
4.9 (Medium)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-01 17:18 UTC
CWE
  • CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
Vendor Product Version CPE status
Elastic Elasticsearch Affected: 9.4.0 , ≤ 9.4.2 (semver)
Affected: 9.0.0 , ≤ 9.3.5 (semver)
Affected: 8.0.0 , ≤ 8.19.16 (semver)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-56149",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-01T17:18:43.883917Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-01T17:25:09.581Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Elasticsearch",
          "vendor": "Elastic",
          "versions": [
            {
              "lessThanOrEqual": "9.4.2",
              "status": "affected",
              "version": "9.4.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "9.3.5",
              "status": "affected",
              "version": "9.0.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.19.16",
              "status": "affected",
              "version": "8.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eAllocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can lead to a denial of service via Excessive Allocation (CAPEC-130). A user with elevated privileges can submit a specially crafted machine learning request that causes excessive memory consumption, which may render the affected node unavailable.\u003c/p\u003e"
            }
          ],
          "value": "Allocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can lead to a denial of service via Excessive Allocation (CAPEC-130). A user with elevated privileges can submit a specially crafted machine learning request that causes excessive memory consumption, which may render the affected node unavailable."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-130",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-130 Excessive Allocation"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 4.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-770",
              "description": "CWE-770 Allocation of Resources Without Limits or Throttling",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-01T16:21:24.437Z",
        "orgId": "271b6943-45a9-4f3a-ab4e-976f3fa05b5a",
        "shortName": "elastic"
      },
      "references": [
        {
          "url": "https://discuss.elastic.co/t/elasticsearch-8-19-17-9-3-6-9-4-3-security-update-esa-2026-43"
        }
      ],
      "source": {
        "discovery": "Elastic"
      },
      "title": "Allocation of Resources Without Limits or Throttling in Elasticsearch Leading to Denial of Service",
      "x_generator": {
        "engine": "Elastic CVE Publisher 0.0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "271b6943-45a9-4f3a-ab4e-976f3fa05b5a",
    "assignerShortName": "elastic",
    "cveId": "CVE-2026-56149",
    "datePublished": "2026-07-01T16:21:24.437Z",
    "dateReserved": "2026-06-19T11:01:02.535Z",
    "dateUpdated": "2026-07-01T17:25:09.581Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-56149",
      "date": "2026-09-16",
      "epss": "0.005",
      "percentile": "0.41602"
    },
    "microsoft_vex": {
      "current_release_date": "2026-07-03T01:02:04.000Z",
      "cve": "CVE-2026-56149",
      "id": "msrc_CVE-2026-56149",
      "initial_release_date": "2026-07-02T00:00:00.000Z",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "Allocation of Resources Without Limits or Throttling in Elasticsearch Leading to Denial of Service",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-56149.json",
      "version": "1"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-56149\",\"sourceIdentifier\":\"security@elastic.co\",\"published\":\"2026-07-01T17:16:36.957\",\"lastModified\":\"2026-07-02T17:35:59.397\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Allocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can lead to a denial of service via Excessive Allocation (CAPEC-130). A user with elevated privileges can submit a specially crafted machine learning request that causes excessive memory consumption, which may render the affected node unavailable.\"}],\"affected\":[{\"source\":\"security@elastic.co\",\"affectedData\":[{\"vendor\":\"Elastic\",\"product\":\"Elasticsearch\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"9.4.0\",\"lessThanOrEqual\":\"9.4.2\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"9.0.0\",\"lessThanOrEqual\":\"9.3.5\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"8.0.0\",\"lessThanOrEqual\":\"8.19.16\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security@elastic.co\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":4.9,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"HIGH\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.2,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-07-01T17:18:43.883917Z\",\"id\":\"CVE-2026-56149\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"security@elastic.co\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-770\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"8.0.0\",\"versionEndExcluding\":\"8.19.17\",\"matchCriteriaId\":\"1418D3D7-31ED-45BF-BD7E-22E3081F118F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"9.0.0\",\"versionEndExcluding\":\"9.3.6\",\"matchCriteriaId\":\"56D2B290-835D-4343-8E77-F478C97ED202\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"9.4.0\",\"versionEndExcluding\":\"9.4.3\",\"matchCriteriaId\":\"3BEEF187-66DE-4DBF-8C7D-B5A49BED2CA6\"}]}]}],\"references\":[{\"url\":\"https://discuss.elastic.co/t/elasticsearch-8-19-17-9-3-6-9-4-3-security-update-esa-2026-43\",\"source\":\"security@elastic.co\",\"tags\":[\"Vendor Advisory\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-56149\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-07-01T17:18:43.883917Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-07-01T17:21:13.325Z\"}}], \"cna\": {\"title\": \"Allocation of Resources Without Limits or Throttling in Elasticsearch Leading to Denial of Service\", \"source\": {\"discovery\": \"Elastic\"}, \"impacts\": [{\"capecId\": \"CAPEC-130\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-130 Excessive Allocation\"}]}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 4.9, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"HIGH\", \"confidentialityImpact\": \"NONE\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"Elastic\", \"product\": \"Elasticsearch\", \"versions\": [{\"status\": \"affected\", \"version\": \"9.4.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"9.4.2\"}, {\"status\": \"affected\", \"version\": \"9.0.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"9.3.5\"}, {\"status\": \"affected\", \"version\": \"8.0.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.19.16\"}], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://discuss.elastic.co/t/elasticsearch-8-19-17-9-3-6-9-4-3-security-update-esa-2026-43\"}], \"x_generator\": {\"engine\": \"Elastic CVE Publisher 0.0.1\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"Allocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can lead to a denial of service via Excessive Allocation (CAPEC-130). A user with elevated privileges can submit a specially crafted machine learning request that causes excessive memory consumption, which may render the affected node unavailable.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eAllocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can lead to a denial of service via Excessive Allocation (CAPEC-130). A user with elevated privileges can submit a specially crafted machine learning request that causes excessive memory consumption, which may render the affected node unavailable.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-770\", \"description\": \"CWE-770 Allocation of Resources Without Limits or Throttling\"}]}], \"providerMetadata\": {\"orgId\": \"271b6943-45a9-4f3a-ab4e-976f3fa05b5a\", \"shortName\": \"elastic\", \"dateUpdated\": \"2026-07-01T16:21:24.437Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-56149\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-01T17:25:09.581Z\", \"dateReserved\": \"2026-06-19T11:01:02.535Z\", \"assignerOrgId\": \"271b6943-45a9-4f3a-ab4e-976f3fa05b5a\", \"datePublished\": \"2026-07-01T16:21:24.437Z\", \"assignerShortName\": \"elastic\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.