CVE-2026-33375 Grafana MSSQL Data Source Plugin: Restriction Bypass Leading to OOM DoS
A low-privileged user can bypass API restrictions in the Grafana MSSQL plugin to trigger memory exhaustion, crashing the host container.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-33375?
CVE-2026-33375 is a medium-severity denial of service vulnerability in Grafana Grafana, published on 26 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-400
Which versions are affected by CVE-2026-33375?
1 open source package ship an affected version, including grafana. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
grafana Bitnami | From 11.6.0 | 11.6.14, 12.1.10, 12.2.8, 12.3.6, 12.4.2 |
Products include Grafana Grafana.
How do I fix CVE-2026-33375?
Upgrade grafana to a fixed version for your release line: 11.6.14, 12.1.10, 12.2.8 or 12.3.6.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-33375 being exploited?
There is no known exploitation of CVE-2026-33375 in the wild and no public exploit code.
Other vulnerabilities in Grafana Grafana
Sources
Also known as BIT-grafana-2026-33375, GHSA-9vq6-r4xh-vm55, MINI-42rh-fpfm-jq94, MINI-43g7-cwr2-xxvx, MINI-8q76-wpcq-hcqm, MINI-grxq-qc9c-938h and 6 more.