CVE-2026-15583 SSRF (confused deputy) in Grafana MCP Server via X-Grafana-URL header
Unauthenticated attackers can exploit SSRF to exfiltrate service-account tokens and access internal services via crafted headers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-15583?
CVE-2026-15583 is a high-severity server-side request forgery vulnerability in Grafana MCP Server, published on 15 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-610
Which versions are affected by CVE-2026-15583?
How do I fix CVE-2026-15583?
No fix has been published for CVE-2026-15583 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-2026-15583 being exploited?
There is no known exploitation of CVE-2026-15583 in the wild and no public exploit code.
Public exploit code: 2 proofs of concept on GitHub.
Sources
Also known as GHSA-7cfp-pmw3-4j7r.