CVE-2026-33378: Vulnerability in Grafana Grafana OSS
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.
AI Analysis
Technical Summary
This vulnerability in Grafana OSS involves the misuse of the $__timeGroup macro when used with a SQL datasource, which can lead to an out-of-memory condition by overloading the server. The attack requires low privileges and no user interaction, and it can take upwards of half an hour to cause a crash. There is no confidentiality or integrity impact, only availability is affected. No official remediation or patch is currently documented, and no known exploits are reported in the wild.
Potential Impact
The vulnerability impacts availability by causing the Grafana OSS server to run out of memory and potentially crash. There is no impact on confidentiality or integrity. The attack requires low privileges and no user interaction, making it feasible but slow to execute. If the server is configured to auto-restart, the impact is minimal or non-existent.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. In the meantime, configuring the server to auto-restart can mitigate the impact of this vulnerability by minimizing downtime caused by crashes.
CVE-2026-33378: Vulnerability in Grafana Grafana OSS
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.
CVSS v3.1
Score 6.5medium
Affected software
Grafana
Grafana OSS
pkg:github/grafana/grafanaRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Grafana OSS involves the misuse of the $__timeGroup macro when used with a SQL datasource, which can lead to an out-of-memory condition by overloading the server. The attack requires low privileges and no user interaction, and it can take upwards of half an hour to cause a crash. There is no confidentiality or integrity impact, only availability is affected. No official remediation or patch is currently documented, and no known exploits are reported in the wild.
Potential Impact
The vulnerability impacts availability by causing the Grafana OSS server to run out of memory and potentially crash. There is no impact on confidentiality or integrity. The attack requires low privileges and no user interaction, making it feasible but slow to execute. If the server is configured to auto-restart, the impact is minimal or non-existent.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. In the meantime, configuring the server to auto-restart can mitigate the impact of this vulnerability by minimizing downtime caused by crashes.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GRAFANA
- Date Reserved
- 2026-03-19T07:55:06.977Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a04d641cbff5d861003f1be
Added to database: 05/13/2026, 19:51:29 UTC
Last enriched: 08/11/2026, 13:39:44 UTC
Last updated: 09/14/2026, 22:01:33 UTC
Views: 96
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