CVE-2026-33378

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

Published May 13, 2026 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:a:grafana:grafana:*:*:*:*:*:*:*:*
cpe:2.3:a:grafana:grafana:11.6.14:-:*:*:*:*:*:*
cpe:2.3:a:grafana:grafana:11.6.14:security01:*:*:*:*:*:*
cpe:2.3:a:grafana:grafana:12.2.8:-:*:*:*:*:*:*
cpe:2.3:a:grafana:grafana:12.2.8:security01:*:*:*:*:*:*
cpe:2.3:a:grafana:grafana:12.3.6:-:*:*:*:*:*:*
cpe:2.3:a:grafana:grafana:12.3.6:security01:*:*:*:*:*:*
cpe:2.3:a:grafana:grafana:12.4.3:-:*:*:*:*:*:*
cpe:2.3:a:grafana:grafana:13.0.0:*:*:*:*:*:*:*
cpe:2.3:a:grafana:grafana:13.0.1:-:*:*:*:*:*:*
Type Values Removed Values Added
First Time appeared Grafana
Grafana grafana
Vendors & Products Grafana
Grafana grafana
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Weaknesses CWE-400
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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GRAFANA
Published
Updated
Aug 27, 2026, 5:22 PM
Reserved
Mar 19, 2026, 7:55 AM
Status
Analyzed
Published
May 13, 2026, 8:16 PM
Modified
Oct 26, 2026, 2:10 PM