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CVE-2026-15583

HighPublished

SSRF (confused deputy) in Grafana MCP Server via X-Grafana-URL header

Published: Jul 15, 2026
Updated: Aug 27, 2026
Assigning CNA: GRAFANA
Evidence observed: Aug 11, 2026

Primary CVSS

8.6/ 10High

nvd · CVSS 3.1

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

EPSS probability estimate

0.5%

Low · next 30 days

Percentile: 43.5%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

CVE-2026-15583-PoCPoC
Academic proof-of-concept demonstrating CVE-2026-15583 for authorized security research.

Responsible use

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