CVE-2026-33378 - Vulnerability Details - OpenCVE

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.

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.

Exploitation none

Automatable no

Technical Impact partial

Vendors	Products
Grafana	Grafana

No data.

No data.

References

Link	Providers
https://www.spirityenterprise.com/pentest
https://www.spirityenterprise.com/managed-detection-response
https://grafana.com/security/security-advisories/cve-2026-33378

History

Thu, 14 May 2026 14:15:00 +0000

Type	Values Removed	Values Added
First Time appeared		Grafana Grafana grafana
Vendors & Products		Grafana Grafana grafana

Thu, 14 May 2026 13:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

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		https://grafana.com/security/security-advisories/cve-2026-33378
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'}`

MITRE

Status: PUBLISHED

Assigner: GRAFANA

Published: 2026-05-13T19:28:37.606Z

Updated: 2026-05-14T12:33:58.842Z

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

Link: CVE-2026-33378

Vulnrichment

Updated: 2026-05-14T12:33:55.700Z

NVD

Status : Awaiting Analysis

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

Modified: 2026-05-14T16:21:02.930

Link: CVE-2026-33378

Redhat

No data.

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