CVE-2026-28383: Grafana plugin resources can lead to unbounded memory allocation
A request to the Grafana plugin resources endpoint can cause unbounded memory allocation by reading the entire request body into memory. An authenticated user can exploit this to trigger an out-of-memory condition, potentially causing a denial of service.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Configuration
If plugin resource delivery is not required, disable Grafana plugin resources to eliminate the vulnerable endpoint (disable or remove plugin resource serving in Grafana configuration or plugin settings).
Grafana plugin resources plugin_resources_enabled = false - Compensating control
Place a reverse proxy, WAF, or load balancer in front of Grafana and enforce a maximum request body size (reject or truncate requests larger than a safe threshold) to prevent unbounded memory allocation when handling plugin resource requests.
- Compensating control
Restrict access to Grafana plugin resource endpoints to trusted IPs/networks or internal management networks (apply firewall/ACL rules to limit which authenticated users or networks can reach the plugin resources endpoints).
- Operational
Monitor Grafana memory usage and set alerts for rapid memory growth; if an out-of-memory condition is observed, restart the Grafana service and investigate access logs for large plugin resource requests or abusive authenticated activity.
Event History
Frequently Asked Questions
What is the severity of CVE-2026-28383?
CVE-2026-28383 is classified as a medium severity vulnerability.
How do I fix CVE-2026-28383?
To mitigate CVE-2026-28383, you should limit the request body size to prevent unbounded memory allocation.
Who is affected by CVE-2026-28383?
CVE-2026-28383 affects authenticated users of Grafana who can exploit the plugin resources endpoint.
What kind of impact can CVE-2026-28383 have?
CVE-2026-28383 can lead to an out-of-memory condition, causing performance degradation or service outages.
Is there a patch available for CVE-2026-28383?
Check the official Grafana security advisories page for any available patches or updates concerning CVE-2026-28383.