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6.5
CVE-2026-33375: Grafana MSSQL Plugin Allows Unprivileged Users to Crash Server
CVE-2026-33375 · published 7 months ago
Summary
A security issue in the Grafana MSSQL plugin allows an unauthorized user to crash the server where the plugin is running. This could happen if an attacker with low-level access exploits the flaw. To fix this, update the Grafana plugin to the latest version.
What to do
- Update grafana to version 12.4.2.
- Update grafana grafana oss to version 11.6.14+security-01 or later.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| Bitnami | – | grafana |
>= 12.4.0, < 12.4.2 Fix: upgrade to 12.4.2
|
| – | grafana | grafana oss | < 11.6.14+security-01 |
| – | grafana | grafana |
>= 11.6.0, < 11.6.14 >= 12.1.0, < 12.1.10 >= 12.2.0, < 12.2.8 >= 12.3.0, < 12.3.6 >= 12.4.0, < 12.4.2 cpe:2.3:a:grafana:grafana:*:*:*:*:-:*:*:* |
Original advisory text
Grafana MSSQL Data Source Plugin: Restriction Bypass Leading to OOM DoS
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.
References
- https://grafana.com/security/security-advisories/cve-2026-33375 Vendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-33375 Vendor Advisory
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33375... Vendor Advisory
Internet-facing
60 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit
- Gives an attacker partial control
Type
CWE-400Uncontrolled Resource Consumption
Timeline
Published26 Mar 2026
Updated4 Nov 2026
First seen26 Mar 2026
Sources
CVE-2026-33375 · NVD
BIT-grafana-2026-33375 · OSV
CVE-2026-33375 · MITRE
CVE-2026-33375 · OSV
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