CVE-2026-42127

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

Published Jun 22, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-3w66-95m3-8jxg Grafana: Pre-authentication denial of service in the public dashboard query handler
History
Type Values Removed Values Added
Title Grafana pre-auth DoS through arbitrarily large input to public dashboard query handler Pre-authentication denial of service in the public dashboard query endpoint
Weaknesses CWE-400
Type Values Removed Values Added
First Time appeared Grafana
Grafana grafana
Grafana grafana Enterprise
Vendors & Products Grafana
Grafana grafana
Grafana grafana Enterprise
Type Values Removed Values Added
Weaknesses CWE-400
Type Values Removed Values Added
Weaknesses CWE-770
Metrics ssvc

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

Type Values Removed Values Added
Weaknesses CWE-400
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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GRAFANA
Published
Updated
Aug 27, 2026, 5:22 PM
Reserved
Apr 24, 2026, 3:38 PM
Status
Modified
Published
Jun 22, 2026, 6:16 PM
Modified
Jul 10, 2026, 4:16 PM