by Kastro
Paper/Archive/CVE-2026-19516

CVE-2026-19516

Grafana Grafana MCP Server — CVE-2026-19516 CVE Record

EPSS 0.3%CVSS 9.1
critical.is priorityof 100
32
CVSS 9.1 (CNA)9.1 / 10 × 3027.3Not in CISA KEV+300.0EPSS percentile 23.9.239 × 204.8No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
Grafana MCP Server0.0.0 – 1.0.0–CNA
mcp-grafana0.0.0 – 1.0.0–CNA

Scores by source

GRAFANA (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: partial

References

advisorygrafana.com/security/security-advisories/cve-2026-19516