Grafana MSSQL Data Source Plugin: Restriction Bypass Leading to OOM DoS

Medium
Advisory ID:CVE-2026-33375
Published:2026-03-25
Product:Grafana
CVSS Score:6.5
CVSS Vector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Fixed Versions:
>=11.6.14+security-01 <12.0.0
>=12.1.10+security-01 <12.2.0
>=12.2.8+security-01 <12.3.0
>=12.3.6+security-01 <12.4.0
>=12.4.2

Summary

The Grafana MSSQL data source plugin contains a logic flaw that allows a low-privileged user (Viewer) to bypass API restrictions and trigger a catastrophic Out-Of-Memory (OOM) memory exhaustion, crashing the host container.

Thanks to khanmarshal for reporting this vulnerability to us via our bug bounty program.