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.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

No data.

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Vendors Products
References
Link Providers
https://grafana.com/security/security-advisories/cve-2026-33378 cve-icon cve-icon
History

Wed, 13 May 2026 22:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-400

Wed, 13 May 2026 20:00:00 +0000

Type Values Removed Values Added
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.
Title Grafana Data Source Plugin: DoS (OOM) via Negative Interval Injection in $__timeGroup Macro
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}
cve-icon MITRE

Status: PUBLISHED

Assigner: GRAFANA

Published:

Updated: 2026-05-13T19:35:08.707Z

Reserved: 2026-03-19T07:55:06.977Z

Link: CVE-2026-33378

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-05-13T20:16:20.583

Modified: 2026-05-13T20:16:20.583

Link: CVE-2026-33378

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-13T22:15:09Z