# 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.

- **Severity:** High 8.6 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 Jul 2026
- **Updated:** 27 Aug 2026
- **Also known as:** GHSA-7cfp-pmw3-4j7r

## 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 (Externally Controlled Reference to a Resource in Another Sphere)

## 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.

## 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:

- Academic proof-of-concept demonstrating CVE-2026-15583 for authorized security research. (github_poc): https://github.com/codeb0ssx/CVE-2026-15583-PoC
- CVE-2026-15583 - Grafana MCP Server - High 8.6 - Unauthenticated POST /mcp - Unauthenticated Token Exfiltration (X-Grafana-URL Confused Deputy) (github_poc): https://github.com/abraxas/CVE-2026-15583

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-15583 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2026-15583 in the wild and no public exploit code.

Affected product: Grafana MCP Server. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-15583/ (Markdown: https://insights.sbomify.com/CVE-2026-15583/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-15583
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-15583
- OSV: https://osv.dev/vulnerability/CVE-2026-15583

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-15583/
Summaries are generated and may contain mistakes; the official description above is the record.