Vulnerability-Lookup

(CVE-2026-72678)

Vulnerability from cleanstart – Published: 2026-10-06 00:39 – Updated: 2026-10-05 12:32 – Source website

Summary

Elasticsearch does not validate a size value taken from a user-supplied input before that value is used to reserve memory for an internal data structure

Details

Security vulnerability affects the sonarqube package. Elasticsearch does not validate a size value taken from a user-supplied input before that value is used to reserve memory for an internal data structure.

Severity

6.5 (Medium)


                    
                      CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

URL

Type

	https://github.com/cleanstart-dev/cleanstart-secu…	ADVISORY
	https://osv.dev/vulnerability/CVE-2026-72678	WEB
	https://nvd.nist.gov/vuln/detail/CVE-2026-72678	WEB

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "CleanStart",
        "name": "sonarqube"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "26.6.0.123539-r1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "credits": [],
  "database_specific": {},
  "details": "Security vulnerability affects the sonarqube package. Elasticsearch does not validate a size value taken from a user-supplied input before that value is used to reserve memory for an internal data structure.",
  "id": "CLEANSTART-2026-OE13430",
  "modified": "2026-10-05T12:32:21Z",
  "published": "2026-10-06T00:39:12.197166Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/cleanstart-dev/cleanstart-security-advisories/tree/main/advisories/2026/CLEANSTART-2026-OE13430.json"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2026-72678"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72678"
    }
  ],
  "related": [],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Elasticsearch does not validate a size value taken from a user-supplied input before that value is used to reserve memory for an internal data structure",
  "upstream": [
    "CVE-2026-72678"
  ]
}

CVE-2026-72678 (GCVE-0-2026-72678)

Vulnerability from cvelistv5 – Published: 2026-08-13 19:11 – Updated: 2026-08-13 20:34

Title

Memory Allocation with Excessive Size Value in Elasticsearch Leading to Denial of Service

Summary

Elasticsearch does not validate a size value taken from a user-supplied input before that value is used to reserve memory for an internal data structure. An authenticated user holding only read privileges can submit a single small crafted request to a product API endpoint that causes the node to attempt an excessively large allocation. The resulting memory exhaustion raises a fatal error that terminates the Elasticsearch node process, causing a denial of service for the affected node and degrading cluster health. The defect is not volumetric, so a single request is sufficient regardless of the heap size configured on the target node.

Severity

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/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 2026-08-13 20:23 UTC

CWE

CWE-789 - Memory Allocation with Excessive Size Value

Assigner

elastic mitre root Scorecard

References

1 reference

URL	Tags
https://discuss.elastic.co/t/elasticsearch-8-19-2…

Impacted products

1 product

Vendor	Product	Version
Elastic	Elasticsearch	Affected: 8.19.0 , ≤ 8.19.19 (semver) Affected: 9.4.0 , ≤ 9.4.4 (semver) Affected: 9.5.0 (semver)

Show details on NVD website

JSON

To clipboard

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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Action not permitted

(CVE-2026-72678)

CVE-2026-72678 (GCVE-0-2026-72678)

Tags

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Nomenclature

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