CVE-2026-19516 CVE-2026-19516 CVE Record
Attackers can exploit the X-Grafana-URL header to force the MCP server to make requests to internal services, enabling Server-Side Request Forgery and data exfiltration.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-19516?
CVE-2026-19516 is a critical server-side request forgery vulnerability in Grafana MCP Server, published on 11 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-918
Which versions are affected by CVE-2026-19516?
How do I fix CVE-2026-19516?
No fix has been published for CVE-2026-19516 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-19516 being exploited?
There is no known exploitation of CVE-2026-19516 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-fr94-7cqc-vjrq.