Security readout for executives and security teams
Plain-English summary
A low-privileged caller can make mcp-grafana contact unintended systems that its host can reach, including internal services and cloud metadata endpoints, then read responses. This could expose sensitive internal information and permit limited changes or disruption. The issue is critical because exploitation requires no user interaction and can cross security boundaries.
Executive priority
Treat this as an urgent remediation and exposure-assessment item. Prioritize internet-connected or broadly accessible MCP deployments and hosts with access to sensitive internal networks or cloud metadata. Version applicability and the exact supported fix must be confirmed against Grafana's advisory before closure.
Technical view
The X-Grafana-URL header controls the outbound destination while grafana_api_request controls the method, path, and body, creating SSRF. Destinations can include internal, loopback, and link-local addresses. The earlier CVE-2026-15583 fix protects the service-account token from unintended destinations but does not constrain outbound targets.
Likely exposure
Exposure is most likely where mcp-grafana is deployed, callers can invoke grafana_api_request, and the server can reach sensitive internal or metadata services. The supplied record does not clearly identify affected released versions; its version entries are insufficient for reliable inventory matching.
Exploitation context
The CVSS 3.1 score is 9.1, with network reachability, low complexity, low privileges, no user interaction, and changed scope. The supplied bundle reports KEV as false and provides no evidence of active exploitation. Absence from KEV does not establish that exploitation is impossible or unobserved.
Researcher notes
This is CWE-918 SSRF with response disclosure and caller-controlled request components. CVE-2026-15583 addressed credential forwarding but left destination control unresolved. The supplied affected-version data lists 0.0.0 with default status unaffected, so it should not be used alone to determine vulnerable releases. No exploit procedure or active-campaign evidence is provided.
Mitigation direction
- Review Grafana's advisory and apply its supported update or remediation guidance promptly.
- Restrict access to mcp-grafana and grafana_api_request to trusted, authenticated callers.
- Limit server egress to approved Grafana destinations and block internal, loopback, and link-local targets.
- Filter or reject caller-supplied destination overrides where operationally feasible.
- Monitor outbound requests and responses for unexpected internal or metadata destinations.
Validation and detection
- Inventory every mcp-grafana deployment and record its exact build or release version.
- Compare deployed versions and configurations with Grafana's current advisory.
- Verify untrusted callers cannot control outbound destinations through X-Grafana-URL.
- Confirm network controls prevent mcp-grafana from reaching internal, loopback, and link-local services.
- Review logs for unexpected destinations, unusual methods, or metadata-service access.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-918: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCloud metadata behavior lookup
The CVE wording references SSRF or metadata access, so cloud discovery and credential material review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-19516 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L3.15.3GRAFANAVulnerability scoring details
Base CVSS 3.1 score
9.1CriticalVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://grafana.com/security/security-advisories/cve-2026-19516CVE reference, GRAFANA · vendor-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Server-Side Request Forgery
Server-Side Request Forgery represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.