CVE-2026-15583 — HIGH (8.6)

Vulnerability 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.

CVSS Score

8.6

HIGH

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

NONE

Related Weaknesses (CWE)

CWE-610

References

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

FAQ

What is CVE-2026-15583?

CVE-2026-15583 is a vulnerability with a CVSS score of 8.6 (HIGH). 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-...

How severe is CVE-2026-15583?

CVE-2026-15583 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-15583?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.