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GHSA-3W66-95M3-8JXG

Vulnerability from github – Published: 2026-06-22 18:34 – Updated: 2026-09-21 23:00

Summary

Grafana: Pre-authentication denial of service in the public dashboard query handler

Details

The public dashboard query endpoint does not limit request body size before processing, allowing unauthenticated attackers to trigger excessive memory allocation by sending arbitrarily large JSON payloads. This can lead to denial of service through memory exhaustion. No valid dashboard access token or authentication is required to exploit this vulnerability.

Severity

7.5 (High)


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

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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c 11.6.15"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/grafana/grafana"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.0.0-beta1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c 12.2.9"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/grafana/grafana"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "12.0.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c 12.3.7"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/grafana/grafana"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "12.3.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c 12.4.4"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/grafana/grafana"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "12.4.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c 13.0.2"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/grafana/grafana"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "13.0.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/grafana/grafana"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.9.2-0.20260616075434-82ef13993059"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-42127"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400",
      "CWE-770"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-21T23:00:48Z",
    "nvd_published_at": "2026-06-22T18:16:37Z",
    "severity": "HIGH"
  },
  "details": "The public dashboard query endpoint does not limit request body size before processing, allowing unauthenticated attackers to trigger excessive memory allocation by sending arbitrarily large JSON payloads. This can lead to denial of service through memory exhaustion. No valid dashboard access token or authentication is required to exploit this vulnerability.",
  "id": "GHSA-3w66-95m3-8jxg",
  "modified": "2026-09-21T23:00:48Z",
  "published": "2026-06-22T18:34:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42127"
    },
    {
      "type": "WEB",
      "url": "https://github.com/grafana/grafana/pull/125789"
    },
    {
      "type": "WEB",
      "url": "https://github.com/grafana/grafana/commit/82ef13993059351bf21de35b8488bbd9b42df4f4"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/grafana/grafana"
    },
    {
      "type": "WEB",
      "url": "https://github.com/grafana/grafana/releases/tag/v11.6.15"
    },
    {
      "type": "WEB",
      "url": "https://github.com/grafana/grafana/releases/tag/v12.2.9"
    },
    {
      "type": "WEB",
      "url": "https://github.com/grafana/grafana/releases/tag/v12.3.7"
    },
    {
      "type": "WEB",
      "url": "https://github.com/grafana/grafana/releases/tag/v12.4.4"
    },
    {
      "type": "WEB",
      "url": "https://github.com/grafana/grafana/releases/tag/v13.0.2"
    },
    {
      "type": "WEB",
      "url": "https://grafana.com/security/security-advisories/cve-2026-42127"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Grafana: Pre-authentication denial of service in the public dashboard query handler"
}

CVE-2026-42127 (GCVE-0-2026-42127)

Vulnerability from cvelistv5 – Published: 2026-06-22 16:31 – Updated: 2026-08-27 17:22

Title

Pre-authentication denial of service in the public dashboard query endpoint

Summary

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-22 17:28 UTC

CWE

CWE-400
CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

GRAFANA mitre root Scorecard

References

1 reference

URL	Tags
https://grafana.com/security/security-advisories/…	vendor-advisory

Impacted products

2 products

Vendor	Product	Version
Grafana	Grafana Enterprise	Affected: 11.6.0 , ≤ 11.6.14 (semver) Affected: 12.2.0 , ≤ 12.2.8 (semver) Affected: 12.3.0 , ≤ 12.3.6 (semver) Affected: 12.4.0 , ≤ 12.4.3 (semver) Affected: 13.0.0 , ≤ 13.0.1 (semver)
Grafana	Grafana OSS	Affected: 11.6.0 , ≤ 11.6.14 (semver) Affected: 12.2.0 , ≤ 12.2.8 (semver) Affected: 12.3.0 , ≤ 12.3.6 (semver) Affected: 12.4.0 , ≤ 12.4.3 (semver) Affected: 13.0.0 , ≤ 13.0.1 (semver)

Date Public

2026-06-09 00:00

Credits

Charlie Lewis

Show details on NVD website

JSON

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                "id": "CVE-2026-42127",
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                  },
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                    "Technical Impact": "partial"
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                "timestamp": "2026-06-22T17:28:16.184877Z",
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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.
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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.
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GHSA-3W66-95M3-8JXG

CVE-2026-42127 (GCVE-0-2026-42127)

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