Server-Side Request Forgery in mcp-grafana Affects Grafana by Grafana Labs

CVE-2026-19516

What is CVE-2026-19516?

CVE-2026-19516 is a security vulnerability affecting mcp-grafana, a component of the Grafana data visualization platform developed by Grafana Labs. Grafana is widely utilized for monitoring and visualizing time series data across various applications and infrastructures. This particular vulnerability arises from a server-side request forgery (SSRF) flaw, which allows unauthorized users to manipulate outbound requests made by mcp-grafana. A user can leverage a crafted request header to redirect these outbound requests to unintended destinations, including internal and private network services. This can lead to unauthorized access to sensitive data and systems within an organization, potentially exposing internal APIs or services that are not meant to be accessed externally.

Potential impact of CVE-2026-19516

1. Unauthorized Data Access: Attackers could exploit this vulnerability to gain access to internal network services that are typically secured and not accessible from the outside. This could result in unauthorized exposure of sensitive data or application interfaces.

2. Internal Network Scanning: By manipulating outbound requests, an attacker can probe internal systems, potentially revealing valuable information about the organization's network architecture and available services. This reconnaissance can be leveraged for further exploits.

3. Compromise of Internal Services: If an attacker can access and interact with internal APIs or services, they may be able to perform malicious actions, such as data exfiltration or further injection of malicious payloads, increasing the potential for broader system compromise and operational disruptions.

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