Vulnerability in Grafana OSS

[ Description ]Official description

A user with Viewer permissions can use a path traversal in the Loki data source plugin to reach administrative Loki endpoints and read sensitive backend configuration and internal service information.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund3 Nov 2026WID-SEC-2026-4337

  Grafana: Vulnerability allows information disclosure Translated from German

  Risk mediumCVE-2026-42129

[ References ]References

• grafana.com/security/security-advisories/cve-2026-42129vendor-advisory