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Findings

CVE-2021-39226

Grafana Authentication Bypass Vulnerability

Published Oct 5, 2021 · updated Jun 16, 2026 · grafana grafana

Grafana is an open source data visualization platform. In affected versions unauthenticated and authenticated users are able to view the snapshot with the lowest database key by accessing the literal paths: /dashboard/snapshot/:key, or /api/snapshots/:key. If the snapshot "public_mode" configuration setting is set to true (vs default of false), unauthenticated users are able to delete the snapshot with the lowest database key by accessing the literal path: /api/snapshots-delete/:deleteKey. Regardless of the snapshot "public_mode" setting, authenticated users are able to delete the snapshot with the lowest database key by accessing the literal paths: /api/snapshots/:key, or /api/snapshots-delete/:deleteKey. The combination of deletion and viewing enables a complete walk through all snapshot data while resulting in complete snapshot data loss. This issue has been resolved in versions 8.1.6 and 7.5.11. If for some reason you cannot upgrade you can use a reverse proxy or similar to block access to the literal paths: /api/snapshots/:key, /api/snapshots-delete/:deleteKey, /dashboard/snapshot/:key, and /api/snapshots/:key. They have no normal function and can be disabled without side effects.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 5, 2021 · Catalog

    Detected

    Grafana is an open source data visualization platform. In affected versions unauthenticated and authenticated users are able to view the snapshot with the lowest database key by accessing the literal paths: /dashboard/snapshot/:key, or /api/snapshots/:key. If the snapshot "public_mode" configuration setting is set to true (vs default of false), unauthenticated users are able to delete the snapshot

  2. Aug 25, 2022 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. Sep 15, 2022 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    Grafana is an open source data visualization platform. In affected versions unauthenticated and authenticated users are able to view the snapshot with the lowest database key by accessing the literal paths: /dashboard/snapshot/:key, or /api/snapshots/:key. If the snapshot "public_mode" configuration setting is set to true (vs default of false), unauthenticated users are able to delete the snapshot

Required action

Apply updates per vendor instructions.

CISA due date Sep 15, 2022

Affected

  • cpe fedoraproject/fedora34
  • cpe fedoraproject/fedora35
  • cpe grafana/grafanaversion unspecified
  • vendor Grafana Labs Grafanaversion unspecified

Sources

  • CISA KEVCVE-2021-39226

    Grafana contains an authentication bypass vulnerability that allows authenticated and unauthenticated users to view and delete all snapshot data, potentially resulting in complete snapshot data loss.

    cisa.gov
  • CVE.orgCVE-2021-39226

    Official CVE identifier

    cve.org
  • FIRST EPSSCVE-2021-39226

    30-day exploitation probability 99.9%

    first.org
  • NIST NVDCVE-2021-39226

    Grafana is an open source data visualization platform. In affected versions unauthenticated and authenticated users are able to view the snapshot with the lowest database key by accessing the literal paths: /dashboard/snapshot/:key, or /api/snapshots/:key. If the snapshot "public

    nvd.nist.gov

References