CVE-2026-19516 CVE Record

Answer in brief

CVE-2026-19516 records a Critical severity (CVSS 9.1) vulnerability in CVE-2026-19516 CVE Record. The current sources do not mark it as known exploited. The current feed maps Grafana/Grafana MCP Server (generic), Grafana/mcp-grafana (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 11, 2026Updated Aug 31, 2026Source checked Sep 25, 2026First seen by HOL Aug 11, 2026Material review Aug 31, 2026

Upstream Advisory

Key facts

Risk: Critical · CVSS 9.1
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Not reported

Why this deserves its current priority

CVSS is 9.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Grafana/Grafana MCP Server (generic), Grafana/mcp-grafana (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Grafana/Grafana MCP Servergeneric	0.0.0	Not reported
Grafana/mcp-grafanageneric	0.0.0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Grafana/Grafana MCP Server, Grafana/mcp-grafana.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Aug 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 31, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 11, 2026

Sources and claim methodology

Source referencegrafana.com

Upstream source description

A caller-supplied X-Grafana-URL request header controls the destination of mcp-grafana's outbound requests, and the grafana_api_request tool lets the caller also choose the HTTP method, path, and body. Because the destination is not restricted to the configured Grafana instance, a caller can direct requests at internal, loopback, and link-local network services (including metadata endpoints) and read the responses, resulting in server-side request forgery. The fix for CVE-2026-15583 prevented the configured service-account token from being sent to unintended destinations but did not restrict the destinations themselves.

Quoted source text, attributed separately from HOL analysis.