GHSA-3w66-95m3-8jxg
Grafana: Pre-authentication denial of service in the public dashboard query handler
At a glance
- Published
- Updated
- CVE
- CVE-2026-42127
- Aliases
- BIT-grafana-2026-42127, GO-2026-6541
- CVSS_V3
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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.
Affected packages
| Package | Versions |
|---|---|
| Go · github.com/grafana/grafana | introduced 2.0.0-beta1 |
| Go · github.com/grafana/grafana | introduced 12.0.0 |
| Go · github.com/grafana/grafana | introduced 12.3.0 |
| Go · github.com/grafana/grafana | introduced 12.4.0 |
| Go · github.com/grafana/grafana | introduced 13.0.0 |
| Go · github.com/grafana/grafana | introduced 0, fixed 1.9.2-0.20260616075434-82ef13993059 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-42127 ADVISORY
- https://github.com/grafana/grafana/pull/125789 WEB
- https://github.com/grafana/grafana/commit/82ef13993059351bf21de35b8488bbd9b42df4f4 WEB
- https://github.com/grafana/grafana PACKAGE
- https://github.com/grafana/grafana/releases/tag/v11.6.15 WEB
- https://github.com/grafana/grafana/releases/tag/v12.2.9 WEB
- https://github.com/grafana/grafana/releases/tag/v12.3.7 WEB
- https://github.com/grafana/grafana/releases/tag/v12.4.4 WEB
- https://github.com/grafana/grafana/releases/tag/v13.0.2 WEB
- https://grafana.com/security/security-advisories/cve-2026-42127 WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |