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CVE-2026-15583 is a confused-deputy vulnerability in Grafana MCP Server affecting versions earlier than 0.17.1. The flaw allows an unauthenticated remote attacker to supply a crafted X-Grafana-URL request header that causes the server to send outbound requests to attacker-chosen destinations. In the vulnerable flow, the server can disclose the Grafana service-account token configured in its environment to unintended endpoints, enabling token exfiltration. The same behavior also permits server-side request forgery against arbitrary internal services, including cloud metadata endpoints. The issue is network-exploitable with low attack complexity, requires no privileges or user interaction, and primarily impacts confidentiality.
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What an attacker gets, and what they’ve been doing with it.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A previously addressed Grafana-related vulnerability referenced as the incomplete prior fix context for CVE-2026-19516.
A previously fixed related vulnerability whose remediation stopped the configured service-account token from being sent to unintended destinations, but did not address destination restriction itself.
A previously fixed related vulnerability referenced as incomplete remediation context for CVE-2026-19516.
A high-severity server-side request forgery vulnerability in Grafana MCP Server that could allow a remote unauthenticated attacker to exfiltrate a configured Grafana service account token and target arbitrary internal services, including cloud metadata endpoints.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.