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 allows an attacker with low privileges to trigger an out-of-memory condition by abusing the $__timeGroup macro in queries against SQL datasources. The resulting server overload can cause a crash after prolonged resource exhaustion. The attack vector is network-based and does not require user interaction. The vulnerability affects a wide range of Grafana OSS versions from 8.0.0 to 13.0.1. No official remediation or patch has been disclosed as of the publication date.
Potential Impact
The vulnerability can cause a denial of service by crashing the Grafana server due to out-of-memory conditions. There is no impact on confidentiality or integrity. The attack requires low privileges but can take a significant amount of time (up to half an hour) to cause the crash. If the server is configured to auto-restart, the operational impact is minimal or non-existent. No known exploits have been reported in the wild.
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. Monitor for any updates from Grafana regarding official fixes or workarounds.
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Grafana OSS allows an attacker with low privileges to trigger an out-of-memory condition by abusing the $__timeGroup macro in queries against SQL datasources. The resulting server overload can cause a crash after prolonged resource exhaustion. The attack vector is network-based and does not require user interaction. The vulnerability affects a wide range of Grafana OSS versions from 8.0.0 to 13.0.1. No official remediation or patch has been disclosed as of the publication date.
Potential Impact
The vulnerability can cause a denial of service by crashing the Grafana server due to out-of-memory conditions. There is no impact on confidentiality or integrity. The attack requires low privileges but can take a significant amount of time (up to half an hour) to cause the crash. If the server is configured to auto-restart, the operational impact is minimal or non-existent. No known exploits have been reported in the wild.
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. Monitor for any updates from Grafana regarding official fixes or workarounds.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GRAFANA
- Date Reserved
- 2026-03-19T07:55:06.977Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a04d641cbff5d861003f1be
Added to database: 5/13/2026, 7:51:29 PM
Last enriched: 5/13/2026, 8:07:31 PM
Last updated: 5/14/2026, 6:45:34 AM
Views: 6
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