CVE-2026-42127
Grafana pre-auth DoS through arbitrarily large input to public dashboard query handler
7.5
HIGH
CVSS 3.1
EPSS 0.43%
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.
How to fix CVE-2026-42127
To remediate CVE-2026-42127, upgrade the affected package to a fixed version below.
- —upgrade to 11.6.15 or later
Is CVE-2026-42127 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 11.6.15, >= 12.2.0, < 12.2.9, >= 12.3.0, < 12.3.7, >= 12.4.0, < 12.4.4, >= 13.0.0, < 13.0.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |