CVE-2026-42127

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

State: Published
Severity: 7.5 High
Published: Jun 22, 2026
Updated: Aug 27, 2026
Reserved: Apr 24, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	GRAFANA

Weaknesses

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

Affected Products

Product	Versions
Grafana EnterpriseGrafana	11.6.0 through 11.6.14Affected 12.2.0 through 12.2.8Affected 12.3.0 through 12.3.6Affected 12.4.0 through 12.4.3Affected 13.0.0 through 13.0.1Affected
Grafana OSSGrafana	11.6.0 through 11.6.14Affected 12.2.0 through 12.2.8Affected 12.3.0 through 12.3.6Affected 12.4.0 through 12.4.3Affected 13.0.0 through 13.0.1Affected

References

https://grafana.com/security/security-advisories/cve-2026-42127vendor-advisory

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