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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Grafana | Grafana MCP Server | 0.0.0 – ≤ 0.17.1 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
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abraxas/CVE-2026-15583 ★ 0 · Sep 26, 2026
CVE-2026-15583 - Grafana MCP Server - High 8.6 - Unauthenticated POST /mcp - Unauthenticated Token Exfiltration (X-Grafana-URL Confused Deputy)
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- https://grafana.com/security/security-advisories/cve-2026-15583 vendor-advisory