Vulnerabilities CVE-2026-33378

CVE-2026-33378

Medium

Open

TLP:CLEAR

Grafana Data Source Plugin: DoS (OOM) via Negative Interval Injection in $__timeGroup Macro

NVD CVE.org

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Description

Using the $__timeGroup macro, one can achieve an OOM by overloading the server. This requires a SQL datasource. If the server is set up to auto-restart, the impact is minimal or non-existent, as the attack can take upwards of half an hour to crash the server.

Details

CVSS Score: 6.5
EPSS Score ⓘ: 0.33%

25.5th percentile
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Confidence: 90%
Published: May 13, 2026
Last Modified: Aug 12, 2026

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