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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable yes

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Grafana Grafana Enterprise unaffected
Version Status Constraints
0 affected ≤ 11.6.14
0 affected ≤ 12.2.8
0 affected ≤ 12.3.6
0 affected ≤ 12.4.3
0 affected ≤ 13.0.1
Grafana Grafana OSS unaffected
Version Status Constraints
11.6.0 affected ≤ 11.6.14
12.2.0 affected ≤ 12.2.8
12.3.0 affected ≤ 12.3.6
12.4.0 affected ≤ 12.4.3
13.0.0 affected ≤ 13.0.1

No data.

No data.

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No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://grafana.com/security/security-advisories/cve-2026-42127 cve-icon
History

Mon, 22 Jun 2026 21:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-400

Mon, 22 Jun 2026 19:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-770
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 22 Jun 2026 18:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-400

Mon, 22 Jun 2026 17:30:00 +0000

Type Values Removed Values Added
Description 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.
Title Grafana pre-auth DoS through arbitrarily large input to public dashboard query handler
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GRAFANA

Published:

Updated: 2026-06-22T17:28:35.835Z

Reserved: 2026-04-24T15:38:08.066Z

Link: CVE-2026-42127

cve-icon Vulnrichment

Updated: 2026-06-22T17:28:30.549Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-22T21:00:12Z

Weaknesses