CVE-2026-33375: Vulnerability in Grafana Grafana OSS
The Grafana MSSQL data source plugin contains a logic flaw that allows a low-privileged user (Viewer) to bypass API restrictions and trigger a catastrophic Out-Of-Memory (OOM) memory exhaustion, crashing the host container.
AI Analysis
Technical Summary
CVE-2026-33375 is a vulnerability in the Grafana OSS MSSQL data source plugin where a logic flaw permits a low-privileged user (Viewer) to circumvent API restrictions. This enables the user to trigger catastrophic memory exhaustion (Out-Of-Memory), resulting in a crash of the host container running Grafana. The vulnerability is categorized under CWE-400 (Uncontrolled Resource Consumption). It affects Grafana OSS versions 11.6.0, 12.1.0, 12.2.0, 12.3.0, and 12.4.0. The CVSS 3.1 base score is 6.5 with vector AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H, indicating network attack vector, low attack complexity, low privileges required, no user interaction, unchanged scope, no confidentiality or integrity impact, but high impact on availability.
Potential Impact
Exploitation of this vulnerability results in denial of service by exhausting memory resources, causing the Grafana host container to crash. There is no impact on confidentiality or integrity of data. The attack requires low privileges (Viewer role) and can be performed remotely over the network without user interaction.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided at this time. Until a patch is available, restrict Viewer role assignments and monitor for abnormal memory usage patterns related to the MSSQL data source plugin. Avoid exposing Grafana instances to untrusted users with Viewer privileges.
CVE-2026-33375: Vulnerability in Grafana Grafana OSS
Description
The Grafana MSSQL data source plugin contains a logic flaw that allows a low-privileged user (Viewer) to bypass API restrictions and trigger a catastrophic Out-Of-Memory (OOM) memory exhaustion, crashing the host container.
CVSS v3.1
Score 6.5medium
Affected software
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
CVE-2026-33375 is a vulnerability in the Grafana OSS MSSQL data source plugin where a logic flaw permits a low-privileged user (Viewer) to circumvent API restrictions. This enables the user to trigger catastrophic memory exhaustion (Out-Of-Memory), resulting in a crash of the host container running Grafana. The vulnerability is categorized under CWE-400 (Uncontrolled Resource Consumption). It affects Grafana OSS versions 11.6.0, 12.1.0, 12.2.0, 12.3.0, and 12.4.0. The CVSS 3.1 base score is 6.5 with vector AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H, indicating network attack vector, low attack complexity, low privileges required, no user interaction, unchanged scope, no confidentiality or integrity impact, but high impact on availability.
Potential Impact
Exploitation of this vulnerability results in denial of service by exhausting memory resources, causing the Grafana host container to crash. There is no impact on confidentiality or integrity of data. The attack requires low privileges (Viewer role) and can be performed remotely over the network without user interaction.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided at this time. Until a patch is available, restrict Viewer role assignments and monitor for abnormal memory usage patterns related to the MSSQL data source plugin. Avoid exposing Grafana instances to untrusted users with Viewer privileges.
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: 69c5ac523c064ed76fd41c4b
Added to database: 03/26/2026, 21:59:46 UTC
Last enriched: 07/30/2026, 07:34:19 UTC
Last updated: 07/31/2026, 21:26:44 UTC
Views: 269
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