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CVE-2026-19516
Published:August 11, 2026
Updated:September 01, 2026
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 Packages
https://github.com/grafana/mcp-grafana.git (GITHUB):
Affected version(s) >=v0.1.0 <v1.1.0
Fix Suggestion:
Update to version v1.1.0
github.com/grafana/mcp-grafana (GO):
Affected version(s) >=v0.0.0-20260210124734-bb6802912129 <v1.1.0
Fix Suggestion:
Update to version v1.1.0
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CVSS v4
Base Score:
8.5
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
LOW
Vulnerable System Availability
LOW
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
LOW
Subsequent System Availability
LOW
CVSS v3
Base Score:
9.1
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
LOW
Availability
LOW
Weakness Type (CWE)
Server-Side Request Forgery (SSRF)
EPSS
Base Score:
0.24