CVE-2026-28375 Grafana Testdata datasource can issue unbounded memory allocations
Attackers can cause Grafana out-of-memory crashes by exploiting the testdata datasource, leading to service denial.
- 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-2026-28375?
CVE-2026-28375 is a medium-severity denial of service vulnerability in Grafana Grafana, published on 27 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A testdata data-source can be used to trigger out-of-memory crashes in Grafana.
Weakness: CWE-400
Which versions are affected by CVE-2026-28375?
1 open source package ship an affected version, including grafana. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
grafana Bitnami | From 8.1.0 | 11.6.14, 12.1.10, 12.2.8, 12.3.6, 12.4.2 |
Products include Grafana Grafana.
How do I fix CVE-2026-28375?
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-2026-28375 being exploited?
There is no known exploitation of CVE-2026-28375 in the wild and no public exploit code.
Other vulnerabilities in Grafana Grafana
Sources
Also known as BIT-grafana-2026-28375, GHSA-mp76-5xhh-vxvc, MINI-34cg-f2f2-2fp8, MINI-3hh6-p666-q2pj, MINI-3q59-4p68-5pfp, MINI-8g64-777p-5mqr and 13 more.