CVE-2026-15583Network attack vector

Credential exfiltration via unbound X-Grafana-URL override

Published Jul 15, 2026 · Updated Jul 15, 2026

SSRF in Grafana Labs Grafana MCP server 0.17.1 and earlier allows remote attackers to send requests with configured credentials. The SSE and streamable-HTTP request context accepts a caller-controlled X-Grafana-URL as the outbound base URL while falling back to environment credentials and extra headers. Network access to either transport is enough to disclose the Grafana token or probe internal services and cloud metadata endpoints.

CVSS severity8.6
High
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Grafana Labs Grafana MCP server 0.17.1 and earlier allows remote attackers to send requests with configured credentials. The SSE and streamable-HTTP request context accepts a caller-controlled X-Grafana-URL as the outbound base URL while falling back to environment credentials and extra headers. Network access to either transport is enough to disclose the Grafana token or probe internal services and cloud metadata endpoints.

The record

CVE
CVE-2026-15583
Published
Jul 15, 2026
Updated
Jul 15, 2026
Vendor
Grafana Labs
Product
Grafana MCP server
Classifications
CWE-610, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.0.0 <=0.17.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Grafana Labs · Grafana MCP serverversion=0.0.0 <=0.17.1

Published CVSS scores

8.6Grafana LabsCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-610Externally Controlled Reference to a Resource in Another Sphere
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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