Grafana LabsCVE-2026-19516
Grafana MCP Server: server-side request forgery
Critical9.1CVE-2026-19516 · Published Aug 11, 2026 · updated Aug 31, 2026
A caller-supplied X-Grafana-URL request header controls the destination of mcp-grafana's outbound requests, and the grafana_api_request tool lets the caller also choose the HTTP method, path, and body. Because the destination is not restricted to the configured Grafana instance, a caller can direct requests at internal, loopback, and link-local network services (including metadata endpoints) and read the responses, resulting in server-side request forgery. The fix for CVE-2026-15583 prevented the configured service-account token from being sent to unintended destinations but did not restrict the destinations themselves.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Grafana MCP Server Product | >= 0.0.0, <= 1.0.0 | No fix yet |
| mcp-grafana Product | >= 0.0.0, <= 1.0.0 | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-918
More Grafana Labs advisories
All Grafana Labs| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Aug 27 | Grafana Labs Alloy: exposed files | High7.7 | No fix yet |
| Aug 27 | Grafana Labs Clickhouse Datasource: cleartext transmission | Medium6.1 | No fix yet |
| Aug 26 | Grafana: improper access control | Medium6.3 | OSS 12.4.8+2 more |
| Aug 24 | Grafana OSS: cross-site scripting | Medium6.8 | No fix yet |
| Aug 19 | Grafana: improper authorization | High7.1 | OSS 12.3.11+3 more |
| Aug 17 | Grafana: information disclosure | Medium5.3 | No fix yet |