CVE-2026-42127: Grafana

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Grafana Grafana: up to and including 11.6.14; from 12.2.0, up to and including 12.2.8; from 12.3.0, up to and including 12.3.6; from 12.4.0, up to and including 12.4.3; from 13.0.0, up to and including 13.0.1

Published 2026-06-22. Last modified 2026-07-10.