CVE-2026-15583 | A confused-deputy flaw in Grafana MCP Server allows an unaut… | CVSS 8.6 HIGH

Description

A confused-deputy flaw in Grafana MCP Server allows an unauthenticated remote attacker to exfiltrate the server's environment-configured Grafana service-account token by supplying a crafted X-Grafana-URL request header. This also enables SSRF against arbitrary internal services, including cloud metadata endpoints.

Metadata

CVE ID: CVE-2026-15583
State: PUBLISHED
Assigner: GRAFANA
Reserved: 2026-07-13 11:27 UTC
Published: 2026-07-15 07:29 UTC
Last updated: 2026-07-15 07:29 UTC
Vendor / Product: Grafana / Grafana MCP Server
Sources: cve.org · NVD

Severity & Metrics

8.6 HIGH CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Affected products (1)

Vendor	Product	Platform	Versions
Grafana	Grafana MCP Server	—	0.0.0 ≤ 0.17.1

CVSS scores (1)

Score	Severity	Version	Source	Vector
8.6	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

References (1)

https://grafana.com/security/security-advisories/cve-2026-15583